11-0215-X 11-0215-X 99.99

Reaction WEB Knee Brace


Availability: In stock

Attention Medicare Patients

Our best solution for anterior knee pain. Innovative design works to shift weight away from the painful areas in the knee.  Read More

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Product Details

Product Description

Features & Benefits:

Dynamic Support Webbing
Absorbs shock and shifts weight to alleviate knee pain.
Superior Comfort
Open web design and mesh backing allow for breathability. Velcro straps on the top and bottom ensure the brace stays in place.
Constructed out of elastomer, a blend of latex-free and neoprene-free rubber materials, this brace is ideal for all-day use.
Complete Flexibility
The brace can be worn on the left or right leg and with or without the sleeve.
Undersleeve Included With Every Brace
Made of 85% nylon and 15% spandex the undersleeve reduces friction or chaffing. The undersleeve is supposed to fit tightly, but if you’d prefer a larger undersleeve or need a replacement you can purchase a Reaction Undersleeve separately.

Is the Reaction Web Knee Brace for me?

Ideal for any athlete suffereing from Patellofemoral pain, runner's knee, quadricep or patellar tendonitis, Osgood-Schlatter disease or mild knee pain.

Designed to treat and protect:

  • Patellofemoral pain syndrome (PFPS) or
    chondromalacia patella (runner’s knee)
  • Quadriceps or patellar
    tendonitis/tendinosis (jumper’s knee)
  • Osgood-Schlatter disease
  • General patellar tracking issues and instability
  • Mild knee osteoarthritis

Best for:

  • Everyday living
  • Golf
  • Running
  • Skiing
  • Snowboarding
  • Soccer
  • Tennis
  • Walking
  • Weightlifting

The Best Solution for Athletes Suffering from Knee Pain

Designed by orthopedic surgeons for athletes. The DonJoy Reaction WEB knee brace is one of our best solutions for knee pain. It allows active individuals to stay moving despite having knee pain and can be worn for everyday activities, contact sports, or water sports.

This knee brace features an innovative webbing design much different than average sleeve-like braces. Its unique elastic webbed design paired together with flexible hinges work to provide stability for the knee by absorbing shock and off-loading weight away from the painful area so you can continue the activities you love. Best of all, its breathable and comfortable.

The Reaction WEB helps stabilize the knee and patella for walking, running, golf, hiking, tennis, soccer, volleyball and more. The Reaction WEB is even worn by professional snowboarders, volleyball, football players, and the US Ski Team.

*Limited Edition US Ski Team version features the US Ski Team logo and a red and white undersleeve

DonJoy Reaction WEB Benefits

  • Innovative webbing absorbs shock and shifts weight to alleviate knee pain
  • Open web design and mesh backing for breathability and comfort
  • Dual axis elastomeric web and hinge dynamically stabilizes the patella on all sides
  • Stays in place with adjustable Velcro straps at the top and bottom
  • Allows active individuals to stay moving despite having knee pain
  • Helps stabilize the knee and patella for walking, running, golf, hiking, tennis, soccer, volleyball and more
  • Can be used during contact sports or water sports
  • The brace can be worn on the left or right leg and with or without the sleeve
  • Lightweight and ideal for all-day use

The DonJoy Reaction WEB can be used to treat or prevent the following knee injuries:

  • Patellofemoral pain syndrome (PFPS) or chondromalacia patella (runner’s knee)
  • Quadriceps or patellar tendonitis/tendinosis (jumper’s knee)
  • Osgood-Schlatter disease
  • General patellar tracking issues and instability
  • Mild knee osteoarthritis

DonJoy Reaction WEB Instructions

The brace should be snug and comfortable. Do not over tighten.

DonJoy Reaction WEB Instructions
  • Pull on sleeve until patella is centered in the hour glass shaped opening (wearing the sleeve is optional)
  • Lay web over top of knee joint and center by aligning opening with patella
  • Thread tabs on one side of back pad through inside openings on web and loop tabs to back pad and attach with velcro. (Note: Spacer material side of back pad should be placed facing leg and loop side away from leg. The outside of the webbing has the logo and the inside is dimpled.)
  • Complete for all tabs
  • Once all tabs are affixed to assure proper tightness, lift and pull both lower tags until snug
  • Repeat for top tabs

DonJoy Reaction WEB Care

  • The entire brace can be hand washed with mild soap in lukewarm water
  • Rinse thoroughly
  • Air dry the webbing and backing separately

Shop our full selection of DonJoy knee braces or all DonJoy products.

Size Chart & Fit Help

Take the measurement of your thigh 6" above your kneecap using a flexible type tape measure.  Use the circumference to choose your size.

Note: This product runs small. If you measure between sizes we recommend going up one size for optimum comfort and fit

    Size Thigh
    XS/SM 13" - 18 1/2"
    M/L 18 1/2" - 23 1/2"
    XL/XXL 23 1/2"- 29 1/2"
    XXXL 29 1/2"- 32"

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DonJoy Reaction WEB Knee Brace

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Sort by Ascending
  • Robert at 8/27/2015 2:58 PM
    • I've had ACL reconstruction and partial removal of my meniscus on both knees. I've tried many braces. would you recommend this brace for me?
    • Hello,

      Thank you for Contacting Betterbraces. Sounds like you may have arthritis in both compartments of your knee. I recommend a general knee brace to provide support. You have several options based on if your looking for a brace with Rigid Hinges, Soft Hinges, or No hinges at all. For Rigid Hinge I suggest the Economy hinged knee, soft-hinged the Performer, and No Hinges the Reaction. Please contact us with any additional questions 1-800-553-6019.

      Have a Great Day.
  • Xenon at 8/27/2015 2:12 AM
    • hello,
      I had artho knee surgery 7/2/15. I had a mensicetomy. Two parts of the meniscus was shaved off.. The front lateral and back medial meniscus was shaved. I also have patella tracking issues which resulted in grade 3 cartilage damage under the patella. Arthritis was shaved down from under the patella.. I am a active person.. I need a brace that could support me playing lite basketball on the weekends and lite cycling during the week.. I can squat and hop with no pain.
      Which brace is best for my condition and activity level???
    • Hello,

      Thank you for contacting Donjoy.

      The Reaction knee brace is a patello-femoral knee brace and designed to help with patella stabilization and patella knee pain.
      This would be a great option for you or you can also take a look at other patello-femoral knee brace options.

      Have a Great Day.
  • Jorge Ruiz at 8/26/2015 7:33 PM
    • I have patellar pain and I play Master Basketball. Why one is the best one for my problem?
    • Hello,

      Thank you for Contacting Donjoy. We have several Patella Tendonitis options for you. Please click on the link below for your options. We have patella straps, or patella braces depending on what you prefer.

      Have a Great Day.
  • chip sims at 8/24/2015 6:29 PM
    • I have had knee surgeries. I am close to being bone on bone. I have severe arthritis. They have trimmed my knee cap spas for as can. I am looking for a brace will help with my dailey pain.
    • Hello,

      Thank you for Contacting Betterbraces.

      If you have bone on bone in both the medial and lateral compartments an OA brace is not recommended. Instead you will need to wear a brace for general knee support.

      I recommend you look over our soft-hinged ligament knee braces. I have attached the link below.

      Please contact us with any additional quesitions. 1-800-553-6019.

      Have a Great Day.
  • cindy at 8/20/2015 7:24 AM
  • Ray at 8/6/2015 1:44 PM
    • I suffer from CPPD Calcium pyrophosphate dihydrate crystal deposition disease! Was wondering if this brace would help me! This condition at times is very painful was hoping maybe this will help as support prior to having an attack!
    • The DonJoy Reaction WEB Knee brace would be an excellent choice for your condition. The web design will help shift the load away from the painful points in the knee to help relieve pain and decrease inflammation.
  • Kimberly at 7/22/2015 7:27 PM
    • Hi, I have a grade 4 chondral defect at the top of my trochlea. Even though the defect was treated with abrasion arthroplasty, I still get pain when I squat down. Could this brace help with my situation? TIA
    • Yes, the DonJoy Reaction WEB Knee Brace will help support, and stabilize the patella and keep it aligned in a neutral position, which should help relieve some of the pain around your patella when doing squats. We do not have a brace to help with a bone deformity, but with the Reaction WEB you should still get some relief and support.
  • Petra at 7/18/2015 6:32 AM
    • Hi, I have been reading reviews and I am really considering ordering the Reaction Web brace for my son. What do you do when the velcro starts to wear? Do you have suggestions or does it just get replaced if within warranty period?
    • Petra
      The Reaction Web has a 6 month warranty against manufacture defects not considered normal wear and tear. If the velcro becomes ineffective within this time we will replace the brace
  • Dennis sullivan at 5/31/2015 9:32 AM
    • i have sharp pain in front inside of knee when turning. I play golf get the pain on my back swing. None of the examples mentioned golf. Would this be a good option .i have tried a basic sleeve but it doesn't give enough support.
    • Dennis
      The Reaction Web Knee Brace is going to be a tep up from a basic knee sleeve and it will help reduce anterior knee pain. this brace can be worn by golfers and should provide good support to the knee.
  • AK at 5/30/2015 12:09 PM
    • I am interested in purchasing the Reaction Web Knee Brace. Does it come with the underpad and is the underpad made of neoprene. I am severely allergic to neoprene.
    • There is no neoprene in the Reaction Web Knee Brace and the undersleeve is a spandex material
  • slapy at 5/28/2015 9:05 AM
    • I have Osgood-Schlatter disease will this brace help it and can i play basketball wile wearing it.?
    • Yes the Reaction Web would be a beneficial brace for that condition. The webing should help decrease the anterior knee pain that you have
  • Onnie at 5/6/2015 6:18 PM
    • I have Patellofemoral Syndrome and have two questions about this brace. The first is, will it help with that type of problem, and second, how easy is it to move in this brace? I am involved in multiple activities that require me to bend my knee a lot and/or keep it bent, the knee brace I have is not comfortable for that because it pinches and is not comfortable to keep bent, sometimes difficult. How is this one for mobility?
    • Onnie
      The Reaction Web Knee Brace was designed to decrease anterior knee pain caused by Patello femoral disorders. The brace is very eay to apply and is very flexible and low profile.
  • Honda at 5/6/2015 8:33 AM
    • My thigh 6" above my patella measures 28.5" should I get the XL/XXL or the XXXL? I plan to use this brace for squatting and crossfit 5-6 times a week.
    • Honda
      These braces run a little small so i would suggest the XXXL
  • Megan at 4/29/2015 11:53 AM
    • I dislocated my patella about 5 years ago, my patella now will pop out of place in a sense and cause me a lot of daily pain. I work out in a gym and I am a upcoming professional bowler, will this brace relieve my pain to the patella.
    • Megan
      The Reaction will help with patella dislocation but we do have another brace that works specifically for that problem The Don Joy Tru-Pull Lite is specifically for patellar dislocation. Might work a little better.
  • The Majestic Moose at 4/29/2015 9:55 AM
    • Even though people have asked it before, it has not been answered clearly. Does this brace hold up to daily swimming? I have all the patella issues listed in one knee, but need to swim for back and foot issues and if this brace would make it happen, then it might just save my life (yeah, a sprinkle of drama ;) )
    • All of our braces can be worn in the water as long as they are air dried afterwards
  • Catherine at 4/24/2015 8:41 AM
    • According to a recent MRI, I've "extensive Pattelofemoral disease" and broad areas of high-grade Chondromalacia lateral (and resulting tracking problems), tendinitis/bursitis, etc. etc. All was fine until I fell on it - I am a 54 year old female but very active in competitive kettlebell lifting/hiking/etc. No actual ligament problems (whew) though I do have pain around most of my knee of course.

      My doctor put me into a TruPull Lite, while it is fine for when I am actually active, it appears to cause problems for when I am less active - such as when I am at the office. If I wear it during the day at the office I get pain/numbness at the back of my knee. I am petite, and have always had problems with sizing - especially if it involves my Q angle.

      My question is this - since I want a second brace to switch out if this need to brace turns out to be longer-term - would the Reaction be a good choice for my less active days - or is it meant for less complex/severe arthritic changes?
    • Catherine
      I agree the Reaction Web Knee Brace would be another brace that you can wear for the problems that you are experiencing. The brace is for those who suffer from anterior knee pain caused by some of the same issues that you have.
  • Jessica at 4/18/2015 2:07 PM
    • I have had surgery to repair my meniscus and also have Plica syndrome. I am looking for a breathable brace that will still give me support. What would you suggest for my type of injury?
    • Jessica
      The Reaction Web Knee Brace would be a brace that you could wear. The brace is very low profile and will support the knee after the surgery you had. The brace decreases anterior knee pain.
  • Isabella at 4/2/2015 5:26 PM
    • Hello,
      I am a swimmer and i am starting to run. I experience pain in both my knees after doing these sports. Would you say this will be best to use during the sports so i do not feel the pain. Also would you recommend wearing this over jeans or would it not fit?

    • Isabella
      If you experience pain in the front of your knee then i would reccomend the Reaction Web Knee Brace during your activities. The brace will reduce pain. The brace is to be worn directly on the skin or on the provided sleeve
  • Sarah wilson at 3/20/2015 12:49 PM
    • I had ACL surgery 6 months ago and just got cleared to run track. My doctor gave me a basic sleeve with open patella to run in but I need more support and pain relief. My patella area hurts with jumping, running, sprinting, etc. would this reaction web brace work for me?
    • Sarah
      Yes the Reaction Web Knee Brace would be the right brace for you. The Reaction will absorb those forces on your knee and decrease pain in the fornt of the knee around your kneecap
  • Natalia at 3/19/2015 3:22 AM
    • Hello, I currenly have one of these and am in need of replacement velcro backing strap. Can i purchase this replacement or do i have to purchase the kit once again?
    • Natalia
      We do not have replacement parts for this brace. It has a six month warranty so if it is still under warranty you can take it back to where you recieved it to possibly get it replaced
  • Andrew at 3/10/2015 6:56 AM
    • I'm interested in using this brace for added support while playing Roller Derby, my doctor told me I need a sleeve for added support. I typically get pain on the front of my knee cap and the best way to describe it is the knee crunches. The 2nd thing I am looking for is preventative care because 50% of derby injuries are ligament based with the knee twisting in a way it is not supposed to twist. I am currently using a bulky hinged sleeve that provides good side support and compression. This looks like a lightweight alternative but want to make sure the side supports are strong enough.

    • Andrew
      The Reaction Web Knee Brace is perfect for the pain and crunching you are feeling with your kneecap however the medial and lateral support will be minimal compared to what you are already using. If you are looking for something to prevent an injury to the medial or lateral side of your knee I would suggest a regular hinged knee brace with a patella stabilizer. The Don Joy Performer with hinges may be a better fit for you.
      The hinges are sewn into the material so an to not be too bulky.
  • Aaron at 2/26/2015 7:27 PM
    • My knee shifts due to my weak muscles on the side of my patella. Would this reaction brace help with keeping my knee sturdy. I play football fyi
      Thanks, Aaron
    • Aaron
      If you kneecap shifts then yes this brace will help keep the kneecap stable and tracking in the correct position.
  • Bryanna Morrow at 2/24/2015 12:27 PM
    • I am in my sophomore year in high school and its my first official year competing in my first track season since I wasn't able to last year because of my patella femoral syndrome. would this brace would for my events which would be the 400 & other short distance sprints? the brace I currently have now is big, heavy and it slows me down when I run. will this brace slow me down at all?
    • Bryanna
      I would definately suggest the Reaction Web Knee Brace for you. The brace was designed with you in mind, for someone who experiences anterior knee pain. The brace is very low profile and light weight and should not feel bulky like your current brace.
  • Kim Hernandez at 2/20/2015 9:21 PM
    • I tore my meniscus had surgery on it but most likely will have surgery again until then will this knee brace work. I live in east Texas and it has a lot of hills and I have a bunch of stairs to walk just to get to work. My knee swells, I sit down and turn my knee it pops or I can just stand up and it pops. Will this knee brace work until surgery is done also can you do yoga or running with it?
    • Kim
      The Reaction Web Knee Brace will be agood brace if you get pain in the front of your knee when walking and going up and down stairs. The brace is light weight and flexible, easy to wear.
  • Halil at 2/10/2015 7:36 AM
    • I wrestle, which involves a lot of contact with the ground, deep knee bending, and lateral movements, as well as driving off your legs and I have chondromalacia. Would you recommend the reaction brace as a durable one that won't break through practice or would you recommend a different one of your braces?
    • Halil
      The Reaction Web Knee Brace is a great brace for chondromalacia, however I am not sure it would be the best brace to wear if your a wrestler. The brace may have problems staying on because it is a wrap on. I would suggest the DonJoy Performer Patella Knee Support. The brace is a sleeve and neoprene so it will not get caught up on the mat, like a Reaction might.
  • Eric at 2/5/2015 10:03 AM
    • I do a lot of skiing (alpine), and i get a small amount of pain in my knee, would this help relieve any of the pain while skiing? The pain is mostly medial and at the patella area.
    • Eric
      Yes this brace is designed to decrease anterior knee pain associated with mild OA and patellofemoral problems. This brace may help some of that pain you are feeling. You can also check out our selection of knee braces for skiing.
  • eliza at 2/3/2015 6:30 AM
    • I have the reaction web for both of my knees....the backing velco part has started to wear out and it doesn't grip and stay on well.....can I order JUST that piece or do I need to order entire new braces? (I've had these braces for a while...just normal wear on the velcro)
    • Eliza
      We do have a softgoods kit for the OA Reaction which comes with the backing only. This is compatible to the regular Reaction. You can purchase this from DJO direct 800-336-6569
  • Bailey at 1/28/2015 12:22 PM
    • I do competitive cheerleading which involves a lot of strain on my knees. I have dislocated both of my knees twice and was wondering if this brace is good for preventing more dislocations and if it is flexible enough to cheer with?
    • Bailey
      This brace does give support to the kneecap but if you have dislocated it before, you may want to try a different brace. The Tru-Pull Lite is specifically for patella dislocation and the brace is short and comfortable. This might be a better choice for you.
  • Laura at 1/27/2015 8:19 PM
    • In the reviews many comments were made about the poor quality of the Velcro straps, where they were wearing out so quickly. Has any changes been made to improve the durability of the straps? What is the warranty on this brace and how long is it?
    • Laura
      We have changed the velcro to a more expensive material since the brace first came out. The brace does have a six month warranty
  • Anna Minnaar at 1/21/2015 10:17 AM
    • Do you carry colored sleeves?
    • Anna
      The sleeves only come in gray.
  • Rose at 1/3/2015 8:10 AM
    • I have Patella issues due to severe arthritis under my knee cap....basically, I have no cartilage at all under my caps. The rest of my knee joint is good and stable. I am an active 55 year old female who does CrossFit and Olympic weightlifting activities, however squatting is incredibly painful. I was prescribed an J brace and that has helped but it's rather bulky and hot. I'm looking for something that I can wear that helps my Patella femoral pain issues but is more comfortable to wear. Which would be better for me....this web brace or the Tri pull lite?
    • Rose
      This brace would work for the anterior knee pain that you have. It absorbs the forces on the front of the knee and disperses them away decreasing anterior knee pain.
  • jason at 12/11/2014 6:51 PM
    • I had a complete reconstructive knee surgery last January and I am supposed to wear my brace until January 2015, the problem I have with my current brace is the bulk. I am a CrossFit athlete and would like this brace so it would not get in the way of my Olympic lifts and still give me the support I need not just physically but mentally as well. I will be released in January 2015 but I still want to wear a brace. Would this brace offer what I need it to?
    • Jason
      This brace will not give you the support that you require after the surgery you had. It is for patellofemoral problems not ACL injuries. If you want a soft brace you could go with the Playmaker II with the fourcepoint hinge. While it is not going to give you the protection that your current brace does it is similar in design and has the same technology as one of our rigid braces.
  • Dan at 12/6/2014 10:34 AM
    • Hi, I'm 20 years old and I play football. I have patella tracking issues. Football has caused me so much pain in my knees and I may no longer be able to play because of it. Because my patella alignment is off it has caused damage to my patella. My doctor has brought up patella alignment surgery and I just wondered if this knee brace would help me?
    • Dan
      The Reaction may help with decreasing your knee pain. Other options that will push your kneecap into the correct position are the Don Joy Tru Pull Advanced System or the Lateral J Patella Stabilizer. These braces keep the kneecap tracking in the correct position. Any of these braces might help you with your knee.
  • Robby at 11/10/2014 1:30 PM
    • My son's brace also has issues with the velcro not sticking. We ordered our brace back in the beginning of September. Has it been since that time that the velcro has been upgraded?

      Thanks again!

    • Robby
      The velcro was upgraded before that but we did a rolling change so some of the older velcro was still being sold. It is possible he had an older brace if it was a bigger size. The brace has a six month warranty so if you are having velcro problems and it was purchased in September it is under warranty.
  • Vicki at 10/28/2014 10:02 AM
    • My daughter uses her brace regularly and the velcro piece that holds the knee brace in place is worn out...Is there a way to just get a new velcro back piece instead of paying 100 to get a whole knee brace?
    • Vicki
      We do not have parts for this brace available. The brace does have a 6 month warranty so if it is under warranty it can be replaced. Just take the brace back to where you recieved it. We have upgraded our velcro on this brace so it is possible the brace your daughter has is from the older brace.
  • Phil at 10/16/2014 7:23 AM
    • I have had a total patella dislocation, arthroscopic, as well as knee realignment surgery (back in December 2007). I suffer from swelling and anterior pain. Is this an efficient brace that will help me continue my active life style and prevent some of the pain and swelling or do you recommend another brace?
    • Phil
      Yes, this brace will help reduce anterior knee pain.
  • Glad at 10/16/2014 4:55 AM
    • My orthopedist informed me that my knees don't anatomically track well causing me to have occasional loose knee feeling in addition to swelling and excess fluid after teaching group exercise. I'm looking for tracking support so I can continue to teach group exercise (weight training that includes high reps of moderate to heavy weighted squats and lunges as well as cardio with high impact moves such as tuck jumps and jump kicks). Can the reaction support my knees with these activities?
    • Glad
      The reaction is one option but the Tru-Pull Lite ( is specifically for someone who has patella tracking problems. The brace pulls the kneecap into the correct position and holds it there during activity.
  • Duane De Freese at 10/12/2014 10:01 AM
    • I have a chronic patella tracking issue on my trailing leg (left) from surfing. Surfing puts high compression, extension and torsional strain on all aspects of the knee. I am in an aggressive physical therapy program, but want a brace for support when I surf. Can I use this brace in the water?
    • Duane
      Yes, you can wear this brace in the water and it would be good for your condition.
  • Kevin at 10/9/2014 10:43 PM
    • Hi I was wondering if I will be able to play to my max ability while wearing the reaction web brace because most braces I've worn hinder my playing ability by not allowing me to move as well. I play soccer and do a lot of shooting and moves so I just wanna know if I can still do all those things with this brace. Thank you!
    • Kevin
      This brace is very low profile compared to hinged knee braces, you will be able to play sports without any restriction.
  • harry fenix at 10/7/2014 6:25 AM
    • I have the full force knee brace for my right knee, I have been using it for more than 10 years, it's for the acl injury suffered when i was still very much active with basketball. Recently I tore my acl on my left knee and now I'm not active anymore in basketball, I just do a little running and shoot hoops with my kids. Will this help reduce the pain when I run? In addition I'm 5 feet and 8 inches tall and weighs 270 pounds. I'm planning to get 2, one for each knee. Thanks
    • Harry
      This brace is for those who suffer from anterior knee pain associated from patellofemoral problems. It has no stability for the ACL. Even though you are not playing sports anymore the knee is unstable without a ACL and can be injured with any stop start motion or light cutting can cause injury to the knee. This brace will help with the anterior knee pain if that is what you want it for but if you want any kind of stability you should look at our hinged knee braces.
  • Janelle at 9/29/2014 6:23 PM
    • Hi, I have had 2 acl and a meniscus repair done. Typically I wear my female fource brace on days that are high impact on my knee (jumping and cutting). I was wondering if this would be good for days with running, but no cutting. I still have pain on the lateral and medial sides of my knee after and sometimes during tough workouts. Thanks
    • Janelle
      This brace is typically for someone who has knee pain in the front of their knee, around the kneecap. If your pain is around that area then the Reaction would help with that pain during running. It does not provide medial and lateral support so if you feel that you will need that I would suggest a hinged knee brace such as the Playmaker II.
  • Bobbi at 9/12/2014 7:16 AM
    • I have pain in my sliding leg when bowling or walking downhill. Would this brace give me the added support I need?
    • If the pain is in your kneecap then yes it would. If it is on one of the sides, then you would need something with medial or lateral support, such as the DonJoy Deluxe Hinged Knee Brace.
  • Donn at 9/4/2014 6:32 PM
    • I am currently training for a marathon. Initially I was diagnosed with ITBS on my right knee. Then I developed chondromalacia in the same knee, with a lot of "cracking" sensations and stiffness. Is this the right knee brace for me? Secondly, even with wearing the sleeve, do you anticipate any slipping or discomfort when sweating during the long distance?
    • Donn
      This would be a great brace for the issues that you are having on the knee. The sleeve is used if you get any rubbing or irritation from wearing the brace without the sleeve so it will not keep the brace from sliding down. The brace should stay in place with or without the sleeve.
  • Callie at 9/1/2014 10:35 AM
    • I have dislocated both of my kneecaps in the past and I am looking for a brace that will provide enough support to keep my kneecaps from dislocating again, but I also have arthritis in both of my knees. Preventing my kneecaps from dislocating again is my main concern, but I would also like to find a brace that would help alleviate some arthritis pain. Do you think this brace or one of the Tru-Pull braces be the better choice?
    • Callie
      The Reaction will help the kneecap and mild arthritis. If you have arthritis on one side (medial or lateral) we just came out with the OA Reaction Web Knee Brace that will still give you the support that you need for the patella and it will unload that compartment that has the OA in it. The brace still has the webbing design to take force off the kneecap but now also comes with a hinge that can unload the opposite side of the knee.
  • Robby at 8/31/2014 2:50 PM
    • Size question. Just want to verify the sizing recommendations. He measured 20 in so should he stay a M/L or go up to a XL/XXL?

      Many thanks......
    • Robby
      The M/L should fit fine
  • Allison at 8/31/2014 11:01 AM
    • So i just had a lateral release surgery on my left knee. My Patella was off track, as well as torn cartilage and chipped bone. I am also allergic to neoprene, is this a good brace to use and is it made out of Neoprene?
    • No, this product does not have neoprene, and yes the brace can be used after your surgery
  • Gabrielle at 8/26/2014 6:50 AM
    • My daughter has JRA. She has it bad in her knees. Is this the best brace to help her. She is still in school and it hurts for her to walk around the school. I am looking for something to help her.
    • Gabrielle
      If your daughter has pain in the front of her knees this brace could help with that pain. The webbing design absorbs the force on the knee with daily activities and disperses the force though the webbing of the brace to help decrease pain. I think it is worth trying for your daughter.
  • Andy at 8/25/2014 10:13 PM
    • I have trouble jumping off of my right leg. I tore my meniscus 10 years ago and wondering if it is catching up to me. When I jump it sort of feels like bone on bone. I would like to continue to play rec basketball and ease the pain. I currently use a strap under my knee and it helps somewhat .

      Is the Donjoy Reaction Web knee brace right for me?
    • Andy
      This brace has been successful in reducing pain in the front of the knee. It absorbs force place on the front of the knee and disperses it into the webbing to decrease knee pain. I think this would be something for you to try.
  • Amy at 8/18/2014 6:59 PM
    • I have 2 questions. The first is if this brace would be appropriate for me? I have an LCL injury and require patella stabilization as well.

      Secondly, is this a pull on or wrap around style?

    • Amy
      This brace will give the support you need for the patella and it does have a hinge for the LCL. It is a wrap around type of brace
  • Melissa at 8/18/2014 8:24 AM
    • I have had lateral, medial repair, an acl injury without repair, joint effusion, history of osteochondral injury tibial plateau, chondromalacia patella... I do moderate sports like p90 and T25, boot camp relays which I recently had to stop... I would like a brace that would allow me to play hard without all the pain ... would this brace be a good option for my workouts ...and I've never used a brace before.
    • This a good brace for those with pain in the front of your knee, but will not protect the ACL at all. So if you do not have any stability issues, just anterior knee pain, then the Reaction is going to help. If you have instability in your knee because of the ACL tear then you would need something a little more supportive such as the Playmaker II knee brace.
  • Cory at 8/13/2014 6:03 PM
    • I recently ordered this brace by following the sizing chart, and therefore ordered the M/L. It fits reasonably well but I'm wondering where on the knee the hinges should sit?
    • The hinges sit on either side of the knee joint. Because these are blended sizes if you were in the bottom of the sizing scale the hinges may stick out a bit
  • Ryan Meyers at 8/11/2014 5:55 PM
    • I am actually looking for a brace that will add some extra strength to my knee joint. A couple of months ago I had a tumor removed from my upper thigh which required the Dr to have to remove a good deal of my quadriceps muscles. Vastus intermedius completley removed and partial removal of vastus laterallis and rectus femoris. Needless to say my upper leg is now very weak. I am a bowler and am looking for something that will allow me to squat down a little more without my knee buckling due to lack of strength. I'm thinking something with a flexion stop would be best but kind of think the Reaction brace looks like it could help. Any thoughts?
    • Ryan
      The Reaction will not give you enough support for that leg. I would suggest the Playmaker II knee brace. It has bilateral hinges for medial and lateral support as well as our 4 point strapping system that will help protect the ACL and PCL in the knee. It comes with stops that you can install in your brace that can limit flexion to help keep you from buckling.
  • Tim at 8/6/2014 1:13 PM
    • I have recently had 2 surgeries on the same knee, and starting to have issues with stiffness and walking. Especially early morning when waking up and when the weather changes. What would be the best brace to wear?
    • This brace is best for those who have anterior knee pain. It absorbs force on the front of the knee and disperses the force into the webbing of the brace which decreases pain in the front of the knee. If you are having anterior knee pain this brace may help
  • Chris at 8/6/2014 5:54 AM
    • Hello,

      I have bad osteoarthritis in my knees from many years of sports and construction work. My doctor said I would/should consider knee replacement. He also gave me the option of having hyaluronan injections, which I opted for. While the injections worked and did allow me to freely walk up stairs, the pain is slowly returning. I know this is due to me weightlifting ( I squat 400lbs rep and leg press 1100lb rep ). My questions are, is this brace a good option for lifters to use while lifting? Is this a good brace for my knee overall outside the gym? The pain is mostly when the knee passes a 90* angle ( getting up off the couch ). Thank you.
    • Chris
      If you need a knee replacement, this brace may not be enough support for your knee. This brace is for those suffering from anterior knee pain and mild arthritis. If you need surgery you most likely have severe arthritis. Now if you have pain in the front of your knee the Reaction may help while you are lifting, but if your pain is on one side of the joint then you may need a more involved knee brace specific for arthritis. Check out our selection of arthritis knee braces.
  • Bob at 8/4/2014 7:26 PM
    • Hello,
      I am 40 and noticed that my knees start to hurt.
      I play a fair amount of tennis about 15 hours per week.

      I notice that when I sit down and then stand my knees start to hurt.
      I would like to be proactive and wear a brace for better support in the off season also.

      Would this be a good brace to start with?
    • Bob
      This is a great brace for relieving pain in the front of the knee during and after activity. This brace may benefit you and the pain that you are feeling.
  • Bob Stoner at 8/3/2014 9:47 AM
    • I was interested in the brace for my son who plays offensive line. Was wondering about the sleeve getting mixed reviews that the brace keeps sliding down is there additional or alternative sleeve that can used. Also concerns about the bottom strap that keeps coming on undone. (from reviews read)
      I am currently having a issue with sizing below the knee measures 18" and upper 23". Also currently using shock doc brace but with issues of sizing concerns about fit and ripping the brace apart when putting it on.

    • Bob
      Most of the complaints about the sleeve slipping have been resolved with a new sleeve that has bigger pieces of silicone at the top . The issues with the straps have been resolved, the braces have different velcro and the straps can be velcroed on top of themselves for better fit. The size would be the XL/XXL.
  • chris at 7/27/2014 5:33 PM
    • Hi, I am 34 years old and I have no ACL in my left knee (The PCL and MCL were both replaced with an allograft , the ACL was retorn) with some mild arthritis. I currently have the Donjoy Defiance but I never wear it because it is very uncomfortable and constantly slides down my leg. My activities are very limited and include walking on the treadmill, swimming and going up and down stairs in my house. The pain has been minor and controlled with cortisone injections but my knee buckles sometimes when going up the stairs. Would this brace be suitable for my condition? Thanks
    • Chris
      First if your Defiance does not fit correctly you may need to be re-sized for the brace, remakes can be done for a $300 charge instead of getting a brand new brace. The Reaction Web knee is most likely not the best choice if you are not going to wear your Defiance. I would suggest the DonJoy Playmaker II. It has sufficient support for the activities that you are doing.
  • Chadd at 7/21/2014 6:05 PM
    • I have chondromalacia, patella tracking issues and have dislocated my kneecap twice in the last few years which also has given me patella tendinitis... Would this be the best brace for me or is there something better out there that I should try? I am an active weight lifter and active running in multiple sports and don't like to be on the sideline.
    • Chadd
      This is a good brace for anterior knee pain associated with chondromalacia and patellar tendonitis. You may want to go a different brace because of the dislocations. Take a look at the Tru-Pull Advanced System and the Tru-Pull Lite. These braces will keep the kneecap tracking correctly and help to prevent any further dislocations. The Lite is a smaller lower profile version of the Advanced system.
  • Jen at 7/21/2014 10:48 AM
    • I had ACL repair surgery about a year ago. I am having discomfort and pain on the inside of my knee when I am squatting. (Olympic weightlifting) Do you have a brace that will help with those things? BTW - I squat below parallel. Thanks!
    • Jen
      This knee brace could help with this pain you are having. It is not uncommon to have patellofemoral pain after an ACL surgery especially when putting such a great load on the knee by squatting beyond 90 degrees. This brace helps to absorb that load and transfer it into the webbing to take pain away.
  • Al at 7/12/2014 5:27 PM
    • Hi, I recently bought this brace and it keeps sliding down, even though it is properly tight. I think it is because of the undersleeve, it is very slick and so is easy for the brace to slide down. Has this happen to other customers? Is there anything you can recommend or is one of the other <a href="" target="_blank">undersleeves</a> that you sell better at keeping the brace in place?
      Thanks. Appreciate your response.
    • The other option is to wear the brace directly on your skin without the sleeve. You can try pulling the sleeve up over the top of the brace and tucking it in around the top to hold it in place.
  • Kathy Keels at 7/12/2014 8:36 AM
    • do the hinges lock? i see where it can be used in water - i'm looking for a brace/splint that will i can swim laps in and will keep my knee at a 180 (along w/ankle wraps) please advise
    • Kathy
      No the hinges on the brace do not lock. I would suggest a different brace if you want the hinges to keep you legs straight while swimming. The Procare ACTION Neoprene Brace sleeve has hinges that can be set at 0 degrees of flexion to keep the knee straight.
  • Alain at 7/5/2014 11:24 PM
    • Hi, I've been diagnosed with having Chondromalacia patella and have some pain in the back of my knee when I squat. I am currently doing stretching and strengthening exercises. I mainly play volleyball 2 times a week and some basketball and soccer. I was wondering if this is the right brace for me or could you recommend another which would be better. Thanks
    • This is a great brace for those who suffer from Chondromalacia. The brace absorbs the force put on the kneecap during activity and disperses it within the webbing to help alleviate pain.
  • Mikey at 7/2/2014 9:49 PM
  • Mike at 6/29/2014 2:28 PM
    • I have had two arthroscopes, one ACL reconstruction and am awaiting another arthroscope (once I get an MRI done, i'm 99% sure it's another meniscus tear). My current injury is a medial meniscus tear and I am looking for a brace that is versatile for running, jumping, lifting, hiking, walking, etc. Will this brace be able to support me?
    • Mike
      This knee brace will be a good choice for a meniscus tear. It decreases anterior knee pain by absorbing the forces on the knee and dispersing them into the webbing of the brace. You can do all of your activities in the brace.
  • Fred at 6/24/2014 11:22 PM
    • Does the undersleeve come with the Reaction brace or is it extra? The only link suggests that you can order a replacement undersleeve which in turn suggests that it is included.
    • Fred
      The sleeve comes with the brace. The smaller of the two sizes is the size of the sleeve that comes with it.
  • T Schatz at 6/24/2014 10:51 AM
    • My daughter plays volleyball, and uses a WEB knee brace as prescribed by her doctor, for patella and anterior pain in the knee (I don't recall the medical terms), but the brace works wonderfully for her. I'm just wondering if there's a knee pad made to be worn over it. The rubber obviously doesn't slide on the floor which causes more knee pain, and a typical knee pad binds with the brace and pinches her skin. I'm thinking something that is more open on the back, high and low straps perhaps? Any suggestions?
    • Im sure a traditional volleyball kneepad would fit over the brace in a bigger size. Another option is our DonJoy Sports Knee Pad. It is universal in size and wraps around the knee.
  • Amber Lane at 6/23/2014 9:35 AM
    • Hello- I am a marathoner who has OA. I recently had arthroscopic surgery to remove floating bodies from my knee. I recovered well for about 6 weeks with no pain in my knee. Then I came back too quick and ran a half marathon and I've had medial knee pain ever since. I am able to run very little with more pain now than I had 6 weeks out of surgery. My Orthoepic surgeon tells me I have arthritis, which I understand. However, I was running pain free before my half marathon. I am wondering if this knee brace will relieve medial knee pain while running? I've read a lot of these questions and I am wondering what you're considering moderate OA? I am very interested and want to try this brace to see if it will relive my pain. Before arthroscopic surgery my ortho did think I might need a lateral release, but once he got in there he said He didn't think I needed it. Plead help!
    • Amber
      This brace is usually for those with anterior knee pain associated with the kneecap. It could be that your medial pain is from your kneecap since the doctor was thinking of doing a lateral release. The brace might help relieve your pain. Moderate arthritis is narrowing of the joint space but the bones are not touching yet. There is little cartilage on the bone but some still remains. Once that cartilage is gone then you have bone-on bone severe arthritis and there is no space between the bones. I have had some customers who have had moderate to severe arthritis and they have had some relief with this brace so it may help you. We do have a 90 money back guarantee, so if you are not satisfied with the brace you may return it for full credit within 90 days of purchasing it.
  • Theresa at 6/21/2014 5:49 PM
    • I am planning to order 2 of the reaction braces for me and 2 for my son. I was wondering which under sleeve would you recommend for use with this particular brace? Our orthopedic recommended this brace but with under sleeves. Thank you.
    • Theresa
      These knee braces come with a undersleeve so there is no need to order an additional sleeve. The size of the sleeve will be the smaller of the blended size of the brace so if you order a M/L the medium sleeve will come with the brace. If the sleeve is too small just give BetterBraces a call and they can replace the smaller sleeve with a bigger one.
  • Tom G. at 6/8/2014 3:30 PM
    • Is it possible to get a replacement Velcro sleeve?
    • Tom
      If you are talking about the back of the brace with the velcro straps, no we do not have that as a replacment part. we do however have replacement undersleeves. They are available throught DJO direct at 800-336-3639
  • Lisa at 6/2/2014 8:10 AM
    • I have been using the Reaction Knee Brace for over a year and I like it. I have PF issues and recently had surgery for a medial meniscus tear. I need a new brace because the velcro no longer sticks. I bought a M/L the last and thought it was too big on my thigh - it never fit quite right. The measurement at 6 inches above my knee cap is just about 18 inches. Will the XS/S be too small? Is there a better brace for a combination of PF, OA and <a href="" target="_blank">meniscus tear</a> repair?
    • Lisa
      This brace is still most likely the right brace for you. If you felt that the M/L was too big, then you should try the XS/S. Even though braces do run a little small, you already know what the M/L feels like on your leg and if it was too big, the next size down would be the logical choice.
  • Phil Turner at 5/31/2014 10:55 PM
    • I am a strong skier and retired pro ski patroller 69 years old, I still have good joint space between the 2 bones but bone to bone femer to knee cap. I am getting some arthritis in the left knee.Lots of pain now skiing under the knee cap and when getting up from sitting position and walking down stairs. Would the reaction brace help this pain, especially skiing? Thanks
    • Phil
      This would be a good brace for you to use to help with that pain under your kneecap. The brace was design for someone like you in mind, to help absorb the shock that your knee gets and transmit the force throughout the muscles of the leg instead of right at your kneecap. We also have a variety of other braces specific to skiing that may help you continue to stay on the slopes if you want more options.
  • Fernando at 5/27/2014 3:05 PM
    • I have a ACL injury is this brace, is the correct brace for playing Golf?????
    • Thank you for your question. The knee brace is designed for knee pain centered around the patella (knee cap). For a ligament injury, a hinged knee is the more appropriate. You should look at the DonJoy Deluxe Hinged Knee or some of these knee braces for golfing.
  • Jenny at 5/20/2014 5:52 AM
    • Hi,
      Does this brace contain latex or neoprene? What materials is it made of? Thanks
    • Thank you for your question. The is no Latex or Neoprene in the Reaction. The Material used is Shore 30a TPE ( thermoplastic Elastomer), Similar to GLS DynaFlex 6730 30a, and Polyester.
  • Lavita at 5/12/2014 7:55 PM
    • I have broken my patella and am in need of a brace. It's 4 weeks post injury and doctor gave no recommendations regarding type. This one looks appropriate for my knee. I can't have anything touch it as it is still tender, bruised, swollen and painful. Is this the correct brace for me? How quick is shipping?
    • Thank you for your question. Yes, this Reaction WEB brace would be appropriate.
  • Rick Weeks at 5/11/2014 1:51 PM
    • We purchased a pair of these for our daughter. Can I get a new set of the "backs" for them? The velcro is wearing out.
    • Rick
      We do not have replacement parts for that brace. You can call Better Braces and get replacement braces if they are still under warranty.
  • Lori at 5/7/2014 7:18 AM
    • What material(s) is the brace itself made out of (not the inner sleeve)?
    • This is the material:
      • Web : Shore 30a TPE ( thermoplastic Elastomer), Similar to GLS DynaFlex 6730 30a
      • Hinge and DRings: Polypropylene with Glass fiber: 75% PP with 10 % GF and 25% EPDM to total 7.5% GF content.
      • Polyester sleeve
  • Leah at 4/29/2014 6:30 PM
    • Is the brace comfortable to wear without the sleeve underneath?
    • Thank you for your question. The brace is often worn without a sleeve. The sleeve is an option for those who have sensitive skin or those who may prefer to wear the sleeve.
  • Brian at 4/27/2014 10:49 AM
    • I have lateral knee pain, and stiffness after running or walking. I have a complex lateral meniscus tear, and also, ITBS. What would be the best brace for me? I gather that since I have no anterior knee pain, this brace would NOT be a good choice.
    • The Reaction may not be the best choice. For the ITB syndrome a knee strap could help such as the DonJoy Cross Strap. But the ITB could be caused by abnormal patella tracking, so you could try the Lateral J Patella Knee Brace. The brace has a lateral buttress around the knee and a strap to pull the kneecap into the correct position. You can also get the brace with hinges to help with general stabilization of the knee.
  • Robert Fegan at 4/24/2014 7:19 PM
    • Both my knees are arthritic and give me a lot of pain. After a short time on them I can hardly stand to bend them. Is this the right brace for me? If my measurement is 23" should I go for Large or XL ?
    • Thank you for your question. If your arthritis is centered in the front of your knee around the knee cap, this brace would be appropriate. If you are looking for support on the medial or lateral aspects of your knee, you may want to look at the rigid hinged knee braces for Osteoarthritis. You may also benefit from the Deluxe Hinged Knee which would offer joint support with the hinges. Check out our selection of knee braces for Osteoarthritis.

      You should follow the size chart on the Deluxe Hinged Knee for all braces. This will take into consideration the knee center and the calf. Since you are close to the XL it would be advised to find the other 2 measurements. If you have questions about sizing, please feel free to call.
  • Al at 4/17/2014 9:09 AM
    • I have had a knee replacement and my new knee skis well. I am wondering if this brace might help make the replacement last longer. I currently do not use a brace of any kind when I ski.
    • Al
      The Reaction Knee Brace is indicated for those who suffer from anterior knee pain. It is used by a lot of skiers for that reason. We do have rigid knee braces that will protect the knee from injury while skiing but no brace will make a knee replacement last longer.
  • Allan at 3/28/2014 9:35 PM
    • Can you tell me what the rear strapping of the Reaction is made of? I am allergic to neoprene, and while this brace is seems ideal for my anterior knee pain associated with patellofemoral syndrome, I am concerned about a sensitivity to the material. Thank you.
    • Allan
      The posterior of this brace is nylon polyester mesh. there is no latex in the product
  • Howard at 3/23/2014 12:10 PM
    • I bowl 3 times a week. I have had my left knee replaced and my right knee needs it. I need to stabilize my knee when I bowl. I don't think I need to protect it from further injury. I just need to keep pressure on both knees, it relieves the pain in the right knee and the "loose" feeling in the bionic knee. Is the reaction brace a good solution for my problems?
    • Howard
      If you feel like you have pain in the front of your knee when bowling, then this would be a good brace for you. If you feel your knee is unstable as a whole, I would suggest the DonJoy Economy Hinged Knee Brace: The bilateral hinges will give your knee the much needed support.
  • James at 3/23/2014 11:01 AM
    • I noticed in the reviews that there is an issue with the velcro wearing out fast. Has this problem been resolved?
    • James
      We are working on that particular issue but we have not had a new product come out yet
  • Adam at 3/23/2014 4:29 AM
    • Would this brace fit under jeans? Or do you need to wear looser clothing
    • It will fit under regular size jeans not skinny jeans
  • Dika at 3/17/2014 1:45 PM
    • I don't have any serious knee injuries, but i get a lot swelling and stiffness and minor pains around my knee. would this product help?
    • Dika
      A knee sleeve would work best for swelling and stiffness. or this
  • Dave at 3/13/2014 9:32 AM
    • For sizing, are we really to use the diameter of the thigh, or do you really mean the circumference of the thigh?
    • It is the circumference
  • Deb at 3/10/2014 4:26 PM
    • Have had torn meniscus repair in left knee dow.n twice, I am a 60 year old female who started running about 4 years ago and got up to the half marathon distance. Hoping to continue again but the doc says I am almost bone on bone. Before the surgery he sad I should be back to running in about 6 weeks after surgery, then it was 2 months, then 3 months, now it is a well we can try a few things up to a knee replacement, (I am not ready for this). He did not suggest a knee brace of any sort. He suggests swimming and cycling, I like to cycle and hate swimming. I want to run. What would you suggest?

    • Thank You for your question. If most of your pain is centered around the knee cap and in the area the Reaction WEB brace covers, this would be a great brace for you. If the knee pain is more medial/lateral (on the sides) or deep inside the knee joint you may look at the DonJoy Deluxe Hinged Knee or the DonJoy economy Hinged Knee.
  • Fed at 3/8/2014 8:56 PM
    • hi
      i have cartilage lose due to a meniscus injury not treated properly, i practice wakeboard and although i dont feel too much pain, sometimes i feel pain on the back of my knee... would this brace help for my situation and is it good for wakeboarding? had a cti in the past but wasnt a very good experience...
      what would you recommend? thank you!
    • Fed
      The Reaction knee brace is a good substitution for a knee sleeve, which is what I would reccomend for womeone with a meniscus injury. The Reaction will not hlp the pain in the back of your knee though. this brace is indicated for those who have anterior knee pain. The pain you experience behind your knee could be the meniscus, but this brace would still be better than a regular sleeve. and better in the water
  • Anthony at 3/5/2014 8:09 PM
    • I recently ordered one these braces from eBay, and received a brace that did not fit. According to the size chart I should use a 2xl, too be safe I ordered a 3xl,and it was too small. After checking I noticed the Web portion was marked L. After asking a friend who has the same brace in a medium I discovered there was an M on hers which leads me to believe I was sent the wrong size Web portion. My question is if I order a brace from you can u promise me it will be marked the right size and fit accordingly? I have bad knees and desperately need this brace but I'm afraid of spending another hundred dollars on something I can not wear
    • Anthony
      The Reaction braces on Amazon are the same brace that we carry on our website so the sizes will be the same. The letter on the webing does not nessacarily correspond to the size of the brace. These braces run small and we are correcting the sizing problem but have not finished the process yet. If you order a XXXL from our website it will most likley not fit as well. I would suggest you look at another brace that will fit you correctly
  • Kim murphy at 3/5/2014 3:47 PM
  • Dale at 3/2/2014 9:45 PM
  • Bill at 3/2/2014 2:19 PM
    • I had a TKR over two years ago. Have seen 9 different Doctors about the continuing pain and stiffness in the knee but no one can tell me what is wrong. Have had every test that can be done any none of them can see anything wrong with the knee replacement nor the soft tissue. I wear a compression brace that is I would say mild support and it helps. I am 62 and love to walk and play golf but have a little difficulty doing both because of the pain. Would you suggest one of your braces? Hurst when I twist it. Thanks
    • Bill
      If wearing a sleeve helps relieve your pain a little , the Reaction May help more. It is indicated for those that suffer from anterior knee pain and is a better substitute than a sleeve
  • Terri at 3/1/2014 11:01 PM
    • I have tricompartmental oa. Looking for a brace for running that is not too heavy. Will this work?
    • Terri
      The Reaction Knee brace is indicated for those with anterior knee pain associated with patellofemoral dysfunction, patellar tendonitis, quadreceps tendonitis and mild arthritis. If you have anterior knee pain with you arthritis this brace may help
  • jan at 2/28/2014 11:18 AM
    • is this brace good for stage 3 chondromalacia patella pain?
    • Jan
      Yes the Reaction knee brace is indicated for those who suffer from chodromalcia
  • Rick at 2/26/2014 7:50 PM
    • I am going to order a set of these for my daughter, however the measurement of her thigh is 18.5 inches, which size do you recommend?
    • Rick
      These tend to run a little small so my advise is to order the medium for your daughter
  • Charity at 2/13/2014 4:09 PM
    • My mom had stupid doctors who didn't realize she dislocated her knee cap. Now it is deformed to the right of her knee. We need a brace/sleeve to help take some of the pressure off to help her mobility. We are not supposed to use a stabilizing full brace due to the cap placement. Could this be helpful?
    • Thank you for your question. The Reaction Knee Brace can be used for patellar tracking. It is most commonly used for any generalized knee pain centered around the knee cap. Some other options to consider would be the Lateral “J”, “H” buttress or the tru-pull depending of if her knee cap dislocate to the outside of the leg, or the inside. If you have questions Please feel free to contact product support at 888.405. 3251.
  • Dennis Freeze at 2/13/2014 12:42 AM
    • I suffered a complete quadriceps rupture, with surgical reattachment. I have no lateral instability, but the knee wants to buckle (suddenly) occasionally. My doctor thinks it's from slow-healing nerve damage. Other than the buckling, my knee is pretty strong except end-range stuff (still can't walk down stairs properly).

      I need to start exercising again, and I'm concerned that the buckling could happen at the wrong time while moving. It's always a momentary thing, and then it catches hold again. I'm afraid if I'm moving around more, I might not be able to catch myself in time.

      Will this brace work? Will the hinges slow down any sudden buckling of the knee?
    • Dennis
      The hinges on this brace are not that supportive. If you have pain in the front of your knee while walking up and down stairs this brace can help decrease that pain. If you would like more stability with hinges I would suggest the Economy hinged knee brace. This brace has metal hinges that would protect better than the Reaction brace
  • Kelli at 2/9/2014 10:13 AM
    • I have chondromalacia due to alignment issues and have very little cartilage in my right knee. I have been very inactive for the past few years due to the pain I feel doing common things like walking and climbing stairs at home and at work and even from sitting. I am looking for a knee brace that I can wear all the time that fits under clothes and is comfortable and will allow me to return to the active lifestyle I used to have before this all became such a huge issue. Will this knee brace help? Or is there a better one that you can recommend?
    • Kelli
      The Reaction knee brace si the brace that i would suggest for the isuues that you are having with your knee. The brace is indicated for thoses with anterior knee pain due to chondromalacia
  • Kyle at 2/8/2014 9:00 PM
    • I work for a company that requires me to do many stairs with added weight (1-45lbs). What brace would be best for preventing the added stress that my knees will be under due to the impact caused by the added weight?
    • Kyle
      The Reaction Knee brace would work well if you get pain going up and down stairs by dispearsing that force on you knee into the elastomeric web of the brace.
  • Stephen at 1/28/2014 1:29 PM
    • Hello,

      I play catcher for my baseball team and my knees have been hurting for as long as i can remember. And I was wondering if this knee brace would be ideal for playing the catcher position e.g. staying in the crouching position for long periods of time, and running a lot.
    • Thank you for your question. This Reaction WEB Knee brace is designed for knee pain in the front of the knee. If your knee pain is on the sides or the back of the knee you may want to consider a sleeve for compression or a hinged knee brace that will offer support to the medial and lateral sides of the knee. If you have questions please feel free to call product support at 888-405-3251.
  • Ken at 1/26/2014 2:40 PM
    • I measure 22 inches- six inches above the knee .What size reaction brace should I order ?
    • 22 would fall into the M/L brace, but the braces do run a little small so XL/XXL might be a better fit
  • Christina at 1/25/2014 1:21 PM
    • I have dislocated by patella several times and currently have lateral patella subluxation with most weight bearing activities. I currently wear a sleeve (Bledsoe) with a "j" buttress designed to provide lateral patella stabilization. With this brace I am able to run marathons without pain or stabilization problems. However, the sleeve is very hot, sweaty, and uncomfortable on long runs.

      I am wondering if the Reaction knee brace will be a suitable replacement brace (i.e. provide similar stabilization and support)? Currently I have to replace my knee brace every 6-9 months while training for a race (~6-8 hrs of running/week; replacement needed due to seams and neoprene tearing). What kind of lifespan can I expect out of the Reaction brace?
    • Christina
      The Reaction Knee Brace is suited for those who suffer anterior knee pain resulting from patellofemoral problems such as patellar tendonitis, chodromalacia and mild arthritis. It is not indicated for those who dislocate or sublux the kneecap. Take a look at the Tru-Pull Advance System or the Tru-Pull Lite. Both of these braces are for those who have the problems that you have with your knee. The Tru-Pull Advance system is the most restrictive of the two braces, the Tru-Pull Lite is lower profile and the material is a more comforatable breathable material. Both have a buttress that you physically align with the outside of your kneecap and then you pull the straps across the knee to keep the patella form moving incorrectly. One of these braces is what i would reccomend
  • Steve at 1/20/2014 7:42 PM
    • Is this the best brace for Patellofemoral Pain Syndrome?
    • Thank you for your question. This brace can be used for Patellofemoral Pain. It is designed to be used for any pain located in the front portion of the knee, around the knee cap. If you have any further questions please feel free to contact us at 888-405-3251.
  • Alisha at 1/19/2014 12:52 PM
    • I dislocated my left about 8 years ago. Ever since when I do activities I notice that it wants to slip occasionally. I will also get occasion pain behind my knee. I am about to start playing indoor soccer and since I am using my legs for kicking and running etc I really feel that I should have a brace for my knee. I am trying to decide which would be the best fit: Reaction, Tru-Pull Lite, or Tru-Pull advanced.

      I have used a variety of knee braces in the past and they always seem too tight on my patella and very uncomfortable.

      Thanks for the help.
    • Hello,

      I recommend the Tru-pull lite for patella dislocations. This brace is 9" in length and has a buttress that sits right up against the patella to prevent dislocations.

      If you would also like a hinge in the brace take a look at the Lateral J Brace. This provides patella support and has the option to add a hinge.

      Thanks for Contacting Donjoy.
  • Pete h at 1/19/2014 4:24 AM
  • Sarah at 1/18/2014 8:05 AM
    • I had a patella subluxation and grade one MCL tear this fall, would this be the best brace for those injuries. 11 years ago I did the same to the other knee requiring surgery to help with the patella tracking, I really don't want to go through that again.
    • Sarah
      The Reaction knee brace is for those who suffer from anterior knee pain associated with patellar tendonitis, and other patellar femoral problems. I would suggest either the Playmaker II with a patellar donut or the DonJoy Drytex Hinged Air Knee brace
  • Tom at 1/16/2014 9:06 PM
    • Have 4 Reaction knee braces, but have forgotten reason for or benefits of the under-sleeve.
      Can I wear the brace without the sleeve?
      What are major benefits to wearing sleeve?
      Does it help to wear the brace while sleeping?
    • Tom you do not have to wear the sleeve. The sleeve is there if you have irritation from the webing of the brace or it is catching leg heir of something. You will get better support without it
  • sherry at 1/12/2014 1:29 PM
    • Does the limited edition ski team brace come in blue?
    • The limited edition comes in blue with a red sleeve
  • tom at 1/12/2014 8:09 AM
    • I have pain in my left knee. I had orthscopic surgery to remove cartilage about 30 years ago. The orthopedic doctor told me the pain is due to severe arthritis, bone-on-bone iritation, and alignment issues (my thigh bone comes in at a slight angle ).

      I am active and can have pain due to being on my feet for long periods of time. I also ski and have pain while skiing and swelling afterwards.

      Would the Reaction WEB Knee brace be a good choice to relieve the pain I'm experiencing?
    • Tom
      You have severe arthritis and the Reaction Knee Brace is not the brace for you. You need to look at either the donJoy Defiance witha OA hinge or the DonJoy OA Adjuster 3
      These braces are for moderate to severe OA. It sounds as if you have lateral compartment arthritis, but you should make sure with your physician before purchasing anything.
  • Nick at 1/7/2014 3:16 PM
    • Out of the performer, lateral J, and Reaction knee braces which do you prefer? I plan to play basketball in this brace and recently had surgery on a broken tibia and torn patella tendon. I experience pain in the front of my knee and occasionally to the sides.
    • Nick
      The Reaction Knee Brace is best for your pain.
  • Aaron at 1/6/2014 1:01 PM
    • i play basketball and i was diagnosed with patellar tendonitis

      i have tried several braces but do not work or are not comfortable.

      will this work for me playing basketball?
    • Aaron
      The Reaction is designed for those who suffer anterior knee pain caused by patellar tendonitis and other patello femoral disorders. This brace should help you when you play basketball
  • Jim at 1/4/2014 6:42 PM
    • I hyperextended my knee many years ago playing football and within the last few years torn my ACL and MCL. Is this is a good brace to use while snow skiing and mountain climbing?
    • Jim
      The Reaction would not give you the protection you need. The best option would be the DonJoy Armor Knee Brace This is a rgid knee brace that will give protection for both ligaments and help with the hyperextension. If you are looking for something a little less expensive, then take alook at the Playmaker II with a forcepoint hinge. both of these braces have the technology that has been clinically proven to help reduce ACL tears.
  • lexi at 1/4/2014 9:05 AM
    • i horse back ride and have patellar tendonitis in my left knee. i am also looking into a everyday brace but this would specifically be for horseback riding. do you think this will work? The issue i have had with braces in the past involve pinching behind the knees and not fitting under my boots or damaging my saddle. I do need a support brace. would this brace work?
    • Lexi
      The Reaction brace should work well for you. It is not made of metal so it should not afect your sadle. There is a opening in the back of the brace so there should not be any irritation behind you leg.
  • Sean Crystal at 1/4/2014 2:12 AM
    • Why inform me on my replacement brace that it will be sent out on a Friday via UPS for Saturday delivery, than when I receive my confirmation, the tracking has it scheduled for Tuesday? I would like to cancel my second order as a result, and will not be returning to in the future
    • Sean
      I apoligise for your inconvience. You can cancel you order by calling at 800.553.6019
  • SageLenea at 12/19/2013 1:58 PM
    • Hello,
      I torn my MCL about 3 years ago. And re injured it about a year ago. Ever since, I have had a lot of pain, mostly with walking and bending. I usually do better with a generic brace, but it eventually bothers the back of my knee (fabric build up) usually due to squatting. Would this brace be a good option for me?
    • Sagel
      The reaction Knee brace will not help support a knee with a MCL sprain. You need a brace that has metal hinges on the side. We have a variety to choose from and you can get them with a hole in the back of the brace so you will not get the bunching of fabric behinde the knee. The DonJoy Deluxe Hinged Knee is a good brace for you and you can get it with a open popliteal which is the opening in the back of the brace. Let us know if you have any other questions
  • mike at 12/18/2013 8:37 PM
    • my legs are lopsided. i have one that is 18.5 and one that is 19 which size should i get?
    • Mike
      The braces run a little small so go with the M/L. Thank you for contacting DJO
  • Jay at 12/13/2013 11:53 AM
    • Is this a good brace for snow sports like skiing?
    • Jay,
      This brace can be worn when skiing. We currently have a US Ski Team Limited Edition that features the blue webbing and a red/white under sleeve. The Reaction WEB knee brace is designed specifically for anterior knee pain (any pain located around the knee cap). Thank you for your question.
  • Ed at 12/7/2013 6:48 PM
    • I had a uni compartmental knee implant (partial knee implant) in the medial portion of my R knee. Now I have a constant ache in the lateral portion of the knee.
      I have had an arthrogram and the orthopedic surgeon told me he could not see
      any abnormality. I use a Lidoderm patch with a neoprene brace when I ski or play
      tennis to relieve the pain. Do you think the Reaction Knee Brace would be a better
      solution for relieving the pain.
    • Ed
      Thank you for contactng product support. The reaction Knee brace is a good brace for those who suffer from anterior knee pain. This sounds like it could help you better than a neoprene sleeve. We would suggest this brace for you. If you have any other questions please let us know
  • Garrett at 12/7/2013 6:41 PM
  • Stuart Paynter at 11/24/2013 4:49 PM
    • My son is an elite skier and has suffered a bone bruise on the top of the tibia which is taking a long time to heal. He still has issues with impact activities like running and jumping and previously had a long bout of O-S. Would the brace help alleviate some of the impact while he recovers?
    • Stuart
      Thank you for contacting product support. The reaction knee brace is for those who suffer from anterior knee pain cause by patellar problems. I don't think this will help your son. A hinged knee brace would most likely be the best possibly the Deluxe Hinged Knee Brace located here:
      Another option if your son has pain on one side of his knee is the OA Lite This brace has a single upright hinge located on the opposite side of the painful side. The hinge helps to unload the side that hurts.Take a look and if you have any other questions please let us know
  • Angel at 11/24/2013 4:25 PM
    • Will this brace help with meniscus problems? My son is a goalie on a hockey team and needs to wear the brace underneath his goalie pads with little interference and feel
    • Angel
      Thank you for contacting product support. The Reaction knee brace is ideal for anyone who has anterior knee pain associated with patellofemoral problems, ie. kneecap problems. It is not really indicated for meniscus tears. I would suggest the DonJoy Cartilage Knee Sleeve brace here: This sleeve is indicated for meniscus tears and can easily go under hockey equipment.
  • Allison MacCormick at 11/20/2013 12:48 PM
    • Hi
      My 14 yr old daughter has patella tracking issues and her knee/leg buckles. She was given the Lateral J Patella brace a couple of years ago. It has been great until now. She plays ice hockey and she has a a couple of incidents in the past 2 weeks where her kneecap has moved while she was playing (and wearing the brace). I am looking to see if there is another brace that might provide more support for her. Any suggestions?
      Thank you
    • Allison
      Thank you for contacting product support. For someone who has patella tracking problems, take a look at the Tru-Pull Advanced System Knee Brace This brace has a buttress on the outside of the knee that can be pulled across the knee so it allows the wearer to apply as much presser as needed to support the kneecap
  • larry at 11/16/2013 6:31 AM
    • Hi

      I have very arthritic knee caps, and feel pain in my knee caps and rear of knee.
      Both knees have been scoped. I started snowboarding last year, and wanted a brace to help keep my knees from being injured, I hate the neoprene sock type of brace , will this brace be appropriate, or would I need one of the stiffer braces?
    • Larry
      The Reaction Knee brace is the ideal brace for those who suffer from anterior knee pain caused by chondromalacia of the patella, patello femoral dysfunction and mild arthitis. The web design works to reduce pain around the kneecap by dispersing the force put on the anterior knee throught the webing of the brace. This brace will help with your anterior knee pain, while snowboarding.If you are looking for something with a little more support, you may want to take a look at one of our hinged knee braces on
  • Cindy at 11/13/2013 7:43 PM
    • I am looking for something that provides support to the knee, and stabilizing the knee cap that does not bunch up at the back of the knee. Any suggestions?
    • Cindy
      Thank you for contacting product support. The Reaction is a good fit for you. It is for those who have anterior knee pain associated with patello femoral problesm. The back of the brace is a lycra type material that has a hole in the back for where your knee bends, so it should not bunch up in the back. If you have any other questions let us know
  • Jan at 11/13/2013 9:34 AM
    • My left interior knee cartilege was removed due to skateboard accident in 1964. Until now, I have used a metal hinged neoprene brace to ski. It works but after a day of sking my knee is swollen and it takes a day of rest & ice,advil to be ready to ski again. I am 66 yrs. and in fairly good condition. I spin,do a bit strength weight lifting and avoid sports that would be impactive or demand a greater degree of knee rotation. My question is would the Reaction web brace be better for my knee blood flow (so it wont swell) and also be able to keep the knee in place?
    • Jan
      Thank you for contacting product support. You have probably developed some arthritis in your knee over the years after your surgery. The Reaction Knee Brace is specifically designed for those that suffer from anterior knee pain caused by patello femoral problems such as mild arthritis, and general knee pain. If you have pain over the front of your knee or around your kneecap this brace may benefit you while sking. I you feel your pain is inside your knee joint as well as the swelling you should see your heath care professional and get their opinion on what type of brace will best suit you, since you may need something a little more supportive.
  • tom at 11/11/2013 3:52 AM
    • I have a rip in my miniscus that has been worked on, I use a neopream brace for skiing and it helps. I do not like the idea or feel I need a bulky brace, would this brace be better than what I am using, and is it a good choice for me?
    • Tom
      The reaction knee brace would work well for you. It is a low-profile, light wieght brace that is perfect for the active person who suffers from anterior knee pain and mild arthritis. This would be a better choice than what you are wearing to ski in now
  • tom at 11/11/2013 3:45 AM
    • When you order the brace does it come with an undersleeve?
    • Tom
      Thank you for contacting product support. Yes the undersleeve does come with the brace
  • Gordon Petrie at 11/10/2013 3:43 PM
    • My knee condition is a repaired ACL with medial OA issues (which is my main problem). I have a custom Defiance III and it works great. I am wondering if the reaction will be a more light weight and slimmer design that will help offload the medial cartilage. I am looking for a brace that can better fit under a wetsuit than the defiance III and give me partial protection
    • Gordon
      Thank you for contacting product support. The Reaction knee brace was designed for individuals who suffer from anterior knee pain, patellof femoral disorders and mild OA. It will not support your ACL or unload the medial compartment of your knee. The Defiance is the best brace for you.
  • Louis at 11/2/2013 12:42 PM
    • My doctor prescribed any kind of brace that is a "Kneecap stabilizer brace" due to chronic knee pain. Is the Reaction a "kneecap stabilizer?"
    • Louis
      Yes the Reaction Knee brace is perfect for those that suffer from anterior knee pain and patellofemoral pain. The web design will stabilize your kneecap and reduce anterior knee pain
  • Tina at 11/2/2013 5:16 AM
    • I have both OA and patella instability. Would this brace work for both?
    • Tina
      The Reaction knee brace is the perfect brace for someone who has mild OA and anterior knee pain. The web disign will encompass the entire knee cap and provide stability. The web design disperses force away from the knee cap and into the rest of the brace, to decrease pain.
  • 2e at 11/1/2013 4:33 PM
    • I am 6 months removed from surgery to repair a ruptured patellar tendon. Recovery has gone very well, I'm back to full range of motion and strength is continuing to return. I do have some pain similar to patellar tendonitis/runners knee when the knee is under resistance at its extremity in flexion, would this knee brace assist in pain reduction and overall movement as I continue to recover and return to an active lifestyle? The rest of the connective tissue in my knee is healthy and I have no instability issues. Thanks.
    • Yes the Reaction knee brace is perfect for someone who is suffereing from anterior knee pain. The web design of the brace is made to disperse the forces on the kneecap into the web of the brace therefore decreasing pain.
  • Irfan at 10/31/2013 11:20 AM
    • Hello there,

      In your sizing section, the Size Chart tab, you have mentioned that to find the right fit, one should wrap a flexible measuring tape 6" above the knee cap and should then use the 'diameter' to find the right fit. Although what the section contains could be the way, but I am assuming that instead of 'diameter', you should have used circumference, which one gets by wrapping a soft measuring tape around any circular, or almost circular, object. Your clarification on how to proceed would be much appreciated.

    • Irfan
      Take a soft measuring tape and measure 6 inches above the mid-kneecap around the thigh and that is how you measure
  • Elizabeth at 10/29/2013 5:02 AM
    • I have a lot of pain in my knees when I do a lot of impact activity and when it is cold. I have bone spurs behind my knee caps. I am going skiing this winter is this the right brace for me?
    • Elizabeth,
      It sounds like the Reaction Knee Brace could be a good fit for you. This brace is designed for any anterior knee pain (pain that is located in the front of the knee in or around the knee cap). The elastomeric web is an innovative solution that absorbs shock, disperses energy and shifts pain away from your knee. It is a comfortable and easy to apply. Thank you for your question and for contacting DJO.
  • Thomas Burkardt at 10/26/2013 4:53 PM
    • Thomas,
      Some insurance will cover the cost or a portion of the cost with a doctor prescription. This will depend on your insurance coverage. You can contact our insurance department to find out more information 800.548.3370. Please feel free to contact us with any further questions. Thank you.
  • Skibum at 10/25/2013 10:23 PM
    • I am 53 year old, have been sking all my life. I haven't torn anything in either knee. Would this brace be beneficial for stability and prevention for an advanced skier in all terrains. My concern is primarily moguel terrain. I do have slight soreness after long sessions. I am concerned about twisting the knee joint since i am no longer a young pup.
    • This brace is the ideal brace for anyone who suffers from general anterior knee pain. If is light wieght and flexible which makes it a great brace for skiers. The brace does have a hinge so it will give mild protection to the inside and outsode of the knee. This is not made for protection of the major ligament of the knee, if you are looking for something like that you would need to look at one of our hinged knee braces such as the Deluxe Hinged Knee Brace: If you have any other question please do not hesitate to ask us
  • Aurie at 10/23/2013 7:52 PM
    • Hi,
      I am a senior in high school and my sophomore year i dislocated my knee cap and then junior year i got ACL reconstruction surgery. I still have some pain in my knee and i'm doing gymnastics this year and i don't want to tweak anything or re-injure. Will this brace help with this?
    • Aurie
      The Reaction Knee Brace is for people who suffer from anterior knee pain and need support around the kneecap. It does not however protect the ACL. The Playmaker II with the donut pad will protect the ACL and give support to your kneecap. Take a look at it on our retail website:
  • Anthony at 10/21/2013 8:45 PM
    • I have your lateral J brace for my dislocating patella. Would the reaction brace provide the same support?
    • Anthony,
      The Lateral “J” will offer more support to your patellar tracking problems than the Reaction. The reaction would be a good choice if it was mild tracking problems and generalized knee pains. If you have a history of dislocations the Lateral “J” is going to be a more supportive brace. Thank you for contacting DJO.
  • Steve at 10/12/2013 11:05 AM
    • I've got a Grade 2 sprain of the MCL and medial patellofemoral ligament, along with grade 4 chondromalacia in the patellofemoral compartment.

      I want to prevent reinjury during the recovery period, and support activity beyond the recovery period.

      I'm looking at the Reaction and the Playmaker II - any advice?
    • Steve
      Thank you for contacting product support. The Playmaker II would be the better choice for all of the conditions that you listed. It has both medial and lateral suppport for your MCL sprain and it can come with a patellar dohnut which will help with the patelofemoral issues that you have. If you have any other questions don't hesitate to contact us.
  • Brian at 10/11/2013 8:45 PM
    • I see that this brace is okay for football and basketball but is it okay to wear for baseball? My son currently wears the pull through lite but this one looks like it would be better. Thanks in advance.
    • Brian
      Thank you for contacting product support. The Reaction Knee Brace can be worn for any sport for anyone who suffers from anterior knee pain. Is is not a bulky brace so it should fit under your sons baseball uniform easily. The differences between the Reaction and the Tru-Pull Lite is that if your son has a problem with his knee dislocating or feeling like it "pops" out", the Tru-Pull is a good brace for him but if he just has general knee pain around his kneecap then I would go with the Reaction. I hope that helps
  • andy beck at 10/1/2013 4:43 PM
    • I have been diagnosed with patella femoral syndrome, and I only get <a href="/cycling-and-biking">pain when I am cycling</a>. Would the reaction brace be a good brace for a cyclist?
    • Hi Andy
      Yes the Reaction Knee Brace would be a good fit for you and the diagnosis you received from your health care provider. The Reaction Knee brace reduces patellofemoral knee pain by dispersing energy across the knee. Its extremely comfortable to wear because of the mesh backing and the web design, and should not hinder you in your cycling. Make sure you measure your leg 6 inches above your kneecap to get the perfect fit. If you have any other questions do not hesitate to contact us, and thank you for contacting product support.

  • Katie at 9/25/2013 7:32 AM
    • What material is the webbing made from? Is it different from the Hinges?
    • Katie,
      The web is made out of elastomer, which is a blend of rubber materials. The hinges are made of a durable plastic and rivets.
      Let us know ifyou have any more questions.
  • Kike at 9/24/2013 8:24 AM
    • The reaction brace will be a good choice for Protec my knees when I kiteboarding .? I don't have any injury but some times after kitting for several hours I get some minor <a href="/knee-injuries">pain on my knees</a>.
      Thank you
    • Kikie,
      The Reaction knee brace is a great brace for anterior knee pain. If you are getting most of your pain in the front of the knee you have made a good choice. If you have any more questions please don’t hesitate to ask.
      Thank you.
  • Todd at 9/4/2013 3:57 PM
    • I am looking to start running more and training for marathon. I have trouble with the dislocation of my patella on my right knee when running. I've been told by my doctors the reason is cause the muscle or ligaments that pull my knee cap into the left are weak and don't work like they are suppose to. I need the lightest and most durable knee brace for my knee so I can start really training for the marathon. Would the reaction knee brace work for me or are there better options?
    • The Reaction is an excellent knee brace that gives more support to the Patella the more movement you have, as you bend deeper the web design gives more support to tyhe knee cap tracking correctly.
  • Casey at 9/4/2013 8:45 AM
    • I have pulled the straps as tight as they will go. The straps go over each other and will not stay in place.
    • It sounds like your brace is too big, you may need to try a smaller size.
  • Heyward at 7/29/2013 8:22 PM
  • Cameron at 7/28/2013 8:45 PM
  • James at 7/25/2013 8:59 AM
    • Hi! I I wrenched my knee quite a while back, eventually had arthroscopic surgery. When I exert a great effort like lunges, jumping jacks, side to side moves and trying to run at full speed my knee buckles. I can only run at about 70% capacity without any issue. I would like to be able to do cross fit training. I don't seem to have issues with certain leg exercises like the squat and leg presses but leg extensions for that knee causes great strain and is at about 50 % capacity of that of my good knee. What knee brace would best suit me?
    • Hello James,

      Are you interested in an Arthritis knee brace. This brace will offload the damaged meniscus and shift your weight to the healthy meniscus. Please see the link below.

      Thanks for Contacting Donjoy.
  • Kit at 7/21/2013 12:16 PM
    • I purchased two of these for my chondromalacia patella. I had to get an XL because the straps were too short on the L.
      I am a 26-year-old 5'7'' female and am not overweight, but on the high end of average.

      Whenever I wear them they seem too big and awkward. It also feels like more pressure is being placed on my kneecaps in front.

      It is hard to tell if I put them on correctly and I am afraid they'll lead to quicker cartilage damage.
      Sometimes I feel more pain after I take them off.
      They seem too tight when I fit them to my legs, but slide off if I don't tighten them a lot.
      It is also hard to tell if they are positioned correctly since the front seems to be made for someone with bigger legs.

      I already feel my knees grinding when walking and they still do this when I wear the braces.

      I was hoping these would help me support my knees so I could walk with more confidence while I worked on physical therapy, but am not sure whether they will help now. Having to get the XL because of the straps makes them feel extremely long and bulky.

      They seems to slide down a lot and the sleeves that came with them are also way too big.

      Could I just be putting them on wrong or is there some other brace I could try?

      These seem like really nice braces but because of the sizing I don't know if they will work for me.

    • Hello Kit,

      What are your measurements 6 inch's above your knee cap, 6 inch's below and around your knee center.

      If the only issue is the Patella then a Patella Stabilizer would provide support and comfort for you. But if you also have cartilage damage, a tear and have had surgery, then you will need an Arthritis Brace. See options below.

      Thanks for Contacting Donjoy.
  • Peter Crone at 7/19/2013 12:25 PM
    • I have full-length leg braces from Warm Springs Foundation in GA. They closed their brace shop. Where can I get these braces repaired... and get new knee caps?
    • Hello Peter,

      You have the Reaction Knee Brace? That brace doesn't have caps.

      But if you need replacements parts for you Donjoy Braces, you can find them on our Retail Site

      Thanks for Contacting Donjoy.
  • reanna at 7/9/2013 5:30 PM
    • i play on our varsity team and 2 other traviling teams. i had displacation , pain, and my knee pops out of place, ut goes back in.would this beace help my knee popping out? i have a mcdavid now and it has hinges and a petallm thing (paded cirlce) to place the knee cap in. would this one be good, if not what would be a good one?
    • Hello Reanna,

      I recommend a the Tru-Pull Lite for a dislocating Patella, please see the link below.

      Thanks for Contacting Donjoy.
  • Andrew at 7/9/2013 3:48 PM
    • Is a little bit of discomfort when first putting it on normal? Or do I just have it too tight or in the wrong place?
    • Hello Andrew,

      The brace should be comfortable. You may have the velcro straps on too tight.

      Thanks for Contacting Donjoy.
  • Steve at 7/9/2013 11:58 AM
    • Would this knee brace help with the knee cap that has a lot of ware an cause a Lot of pain an swelling .
    • Hello Steve,

      If your looking for a knee brace to help with Anterior Knee Pain, this is a great brace. If your looking for a knee brace to disperse force while running/athletics, this is a great brace for you.

      If you need a brace to help with swelling I recommend a compression sleeve with patella support.

      Thanks for Contacting Donjoy.
  • Jason at 7/9/2013 7:48 AM
    • I had a roux-goldthwait procedure performed on my knee 5 years ago, to correct patellar dislocation. I want to start running again, and even though my doc said I don't necessarily NEED a brace, I would like a little piece of mind. Would this brace be a good fit for me? If not, can you recommend one that would work best?
    • Hello Jason,

      Below find the link to our Retail Site, here you will find your options for Patella Stabilizers. Also, see the link for Knee Sleeves below.

      Thanks for Contacting Donjoy.
  • Jerry at 7/7/2013 12:36 PM
    • I have no cartilage in rt knee[end stage]==but no pain,just lack of stability. I tried on the DonJoy sm, and It helpd with strength/stability. I play doubles tennis===Would the OA Full Force be a better choice?-Thanks, J.
    • Hello Jerry,

      The Reaction Knee Brace is a Great Option for Patello-femoral symptoms. If you need a knee brace to support your injured meniscus, I recommend an Arthritis Brace. We have a couple of options but the best option for an athlete like yourself is the OA Full-Fource. Please take a look at the link below.

      Thanks for Contacting Donjoy.
  • Cassia at 6/28/2013 8:30 AM
    • I have a DonJoy Reaction Knee Brace and I am having fitting issues. My thigh is significantly thicker than my calf and no matter how I tighten it, it slips down. Any suggestions?
    • Hello Cassia,

      Are you using the Knee Sleeve underneath? Are you securing the bottom strap first?

      Thanks for Contacting Donjoy.
  • Melissa at 6/27/2013 7:22 AM
    • I have a reaction brace and I am very pleased with it. The problem is that the Velcro has lost its "umph" and doesn't adhere hardly at all now. Can just the this piece be replaced?
    • Hello Melissa,

      There are No Replacement parts for the Reaction. How long have you had the Brace? It does have a 6 month warranty.

      Thanks for Contacting Donjoy.
  • tim at 6/26/2013 8:52 AM
    • hi, i am planning to buy the fullfource brace as i tore my acl and <a href="/knee-injuries/meniscus-tear">meniscus</a>. however, i do have some pain around my shin and patellar. is it possible to add the reaction to my fullfource brace? or do i have to wear one or the other?

      thank you for advise.
    • Hello Tim,

      We do not have an attachment that can be added to the FullFource. I recommend an ACL Brace for your ACL Injury. I also recommend speaking to your Physician about the other symptoms you are having, they could be related to your previous injury, surgery, etc.

      Thanks for contacting Donjoy.
  • jarvis at 6/22/2013 4:37 AM
  • Nicola at 6/1/2013 9:46 PM
    • Hello, I have been diagnosed with patella femoral arthritis and have had arthoscopic surgery in both knees with lateral releases. I still experience most of my pain going up and down steps. I am also chubby and have problems with any previous brace slipping down. My measurement above the knee is @ 23", if I did it correct. What do you recommend?
    • Hello Nicola,

      I suggest going with the larger size. XL-23"

      Take the measurement of your thigh 6" above your kneecap using a flexible type tape measure. Use the diameter to choose your size.

      Size Thigh
      XS/SM 13" - 18 1/2"
      M/L 18 1/2" - 23 1/2"
      XL/XXL 23 1/2"- 29 1/2"
      XXXL 29 1/2"- 32"

      We also have the Tru-Pull lite. Great low profile, short brace.

      Please call us with additional questions. 1-888-405-3251.
  • dave-o at 5/31/2013 10:35 AM
    • I am interested in purchasing this Brace.
      Are they true to size? I am male, 5'9", 185lbs.
      Using the sizing chart my measurement is 17.5"
      Does that really mean that I'm an XS/S?
      Thanks for your help.
    • Hello Dave,

      Yes, that is correct if your thigh, 6" above your knee measures 17.5 inch's, your a Small.

      Take the measurement of your thigh 6" above your kneecap using a flexible type tape measure. Use the diameter to choose your size.

      Size Thigh
      XS/SM 13" - 18 1/2"
      M/L 18 1/2" - 23 1/2"
      XL/XXL 23 1/2"- 29 1/2"
      XXXL 29 1/2"- 32"

      Have a Great Day.
  • Meg at 5/26/2013 7:05 AM
    • I asked this before and can't find the answer. My son suffered a severe traumatic brain injury 6/4/11. Was in a coma and went through 1.5 years of therapy and serial casting to try to get his left leg /ankle to at least be in a 90 degree angle. They decided to cut his hamstring, heel cord and all his toes on that left foot because of the spasticity he was still having. They could barely get his foot to 90 degrees.

      Now his leg sometimes hyper extends. I was hoping this brace above would work so he can build up strength in his leg. I don't want him to rely on braces forever and neither does he. I am ordering his wrist brace now. Sorry to have to ask again, but I can not find the reply. Thank you
    • Hello Meg,

      Your interested in a Brace to prevent HyperExtension? We have several Rigid Knee Braces that you can add an extension stop to prevent the Hyper-extension and prevent falling or giving out of the knee.

      Please call us to speak to a Product Specialist so that we may better assist you. 1-888-405-3251.

  • becky at 5/18/2013 1:06 AM
    • I have a severe neoprene allergy , is there any neoprene in this brace? having a hard time finding a brace without it in there.
    • Hello, Becky -

      The DonJoy Reaction Knee brace does not contain any neoprene in the brace.

      If you have further questions, please feel free to contact our product specialists at 888-405-3251.

      Thank you and have a wonderful day!
  • pat at 5/16/2013 7:31 PM
    • I have mild OA in my right knee can this be used during swimming or is there a better alternate that will standup to the day to day mile swim I do?
    • Hello Pat,

      Yes the Reaction Knee Brace is appropriate for Mild OA.

      We do have other OA braces that will provide more Off-load and pain relief. The link to those braces are below.

      If you would like to speak to a Product Specialist please call us at 1-888-405-3251

      Have a Great Day
  • Sandra at 5/16/2013 12:22 PM
    • I am status post my first series of 3 Synvisc injections for a total loss of cartilage of my medial aspect of the right knee. A partial knee replacement is in my future but I'm trying to postpone as long as possible since I'm pretty young and had been very active (running, skiing, hiking, biking etc). The injections did help but it wasn't until I tried the Kinesiology tape along with Pilates that the most improvement happened in terms of pain relief and improved range of motion.
      I'm looking for a brace for activities such as walking and biking rather than wearing the tape. I've not been told if my patella is off track but without the tape I can feel it popping pretty significantly along the lateral aspect along the patella femoral area.
      The DonJoy Reaction brace sounds like it might be the best option. We do a fair amount of traveling so something light weight is also a consideration.
    • Hello, Sandra

      Thank you for contacting Donjoy.

      I believe you are a great candidate for an OA Brace. What an OA brace does is off-load either medial or lateral compartment. In your case you would want to off-load the medial compartment if your injury is to the medial knee. We have 2 OA braces that would work for you.

      OA Nano-lighest brace available, in the OA Line

      OA Fullforce- designed for athletes

      Please contact your Physician to see if an OA Brace is an option for your treatment.

      Any further questions please contact a Product Specialist at 1-888-405-3251

      Have a Great Day.
  • Erika at 4/26/2013 1:20 PM
    • I have a patella tracking disorder as well as medial/lateral instability and end stage OA. I would like to have a brace that I can wear in the water while kayaking and that will support my knee/patella while walking on sand/mucky river bottoms. Would this brace be good for that or should I try something else? Optimally, I'd like a hinged brace that wraps around since I will be putting it on and taking it off while wet.
    • Hello, Erika -

      The DonJoy Reaction Knee Brace allows for mild to moderate support for patella tracking issues and overall knee instability. It can be worn in the water, however we do recommend that after each use, you rinse the brace in tap water to make sure there is no residue, salt, or chlorine that remains on the brace or in the hinges.

      If you have further questions, please feel free to contact our product specialists at 888-405-3251.

      Thank you and have a wonderful day!
  • Peter at 4/20/2013 3:46 PM
    • My son has Sinding-Larsen-Johansson Syndrome. Would this brace provide pain relief or would you make another recommendation?
    • Hello, Peter -

      The DonJoy Reaction can provide mild pain relief and support for your son. It will help disperse the shock and stress put on the knee joint. However, we do not have a brace specifically designed for his syndrome.

      If you have further questions, please feel free to contact our product specialists at 888-405-3251.

      Thank you and have a wonderful day!
  • Chadd at 3/14/2013 11:13 AM
    • I play college basketball and was diagnosed with chondromalacia two years ago. And got the donjoy Lateral J brace from my PT. I lost the brace however a year ago and continued to play as e pain was more bareable.I came here simply looking to replace the J brace, but noticed this brace and it interested me cuz its more adjustable, after a while the j brace would slip and slide and not seem to fit properly. So I was wondering if this is a good replacement for the j brace, or if I should just get the j brace again?
    • Hello, Chadd -

      Yes, the DonJoy Reaction Knee Brace will assist you with your chondromalacia and is a good replacement for the Lateal J Brace.

      If you have further questions, please feel free to give our product specialists a call at 888-405-3251.

      Thank you and have a wonderful day!
  • Ben at 1/31/2013 12:38 PM
    • Few months ago..I torned my acl during badminton tournament, jump smash and landed with one leg(left). A month ago i had the acl reconstruction, so will this brace help? for badminton will this brace give enough support? and can it prevent acl
    • Hello, Ben -

      This brace is not designed to support the ACL. It was designed to assist and support the patella with tracking issues.

      If you have further questions, please feel free to contact our product specialists at 888-405-3251.

      Thank you and have a wonderful day!
  • Kiera at 1/28/2013 10:33 AM
    • I'm a rower and I have serious pain in both of my knees. On the sides and above my patella. My physical therapist said that I have weak hips and because of them more problems have been caused. My diagnosis for my knee pain is patella mal-tracking, my patellas track medially inwards and I need braces to push them out. I
      tried the DonJoy Reaction Web Knee Braces, but they bunch up so much in the back that I can't get a long enough stroke in and they only helped a little. I need full mobility that would allow my knees to be fully compressed. Would ANY brace work for me?
    • Hello, Kiera -

      The lowest profile brace that would suit your needs would be the DonJoy Tru-Pull LIte:

      Since you have medial tracking issues, you would order the strap to track your patella laterally.

      If you have further questions, please feel free to contact our product specialists at 888-405-3251.

      Thank you and have a wonderful day!
  • Sophie at 1/16/2013 12:42 AM
    • Hi!
      My name is Sophie and I play basketball twice a week and do pe classes - typically running or exercises. I have sore knees when running in basketball and pe, I have a kneecap that moves and just wanted a knee support to help so I can do running, sports carnivals, exercises in sport (
      jumping forward and landing, squats, suicides and burpies) as well as basketball without sore knees!!! So would you recommend this support or another one? and not wanting to spend a huge amount!
    • Sophie,
      This is an excellent brace for an active person with kneecap issues. This brace would be a great choice for what you are looking for.
  • anonymous at 1/9/2013 8:53 AM
    • How heavy are the braces?
    • It weighs 1/2 pound.
  • BART at 1/4/2013 9:16 AM
    • measure 21 1/2 will m/l do?
    • You would be a M/L (11-0215-3).

      Thank you and have a great day!
  • Jasmyn at 11/20/2012 7:14 PM
    • Can I find this specific brace in stores? If so which one I need it as soon as possible.
    • Hello, Jasmyn -

      No the Reaction cannot be bought in stores, however you can order it through Better Braces and have it overnight shipped to you. You would have to place the order immediately if you want it shipped out today. Because of the holiday, our next overnight shipments won't go out until Monday.

      Thanks and have a great day!
  • Jean at 8/20/2012 6:39 AM
    • Will this brace control a patella that dislocates laterally?
      Can it be used without the sleeve effectively?
    • Yes this brace can be used for Patella Subluxation. The sleeve is there for comfort, it is not necessary for the brace to be effective.
  • Priscilla at 8/19/2012 1:44 PM
    • Do you guys sell the black pad separately?
    • We sell the brace and the undersleeve toghether. You can buy
      another undersleeve.
  • Kelsey at 7/24/2012 8:36 PM
    • I have plica syndrome and have had surgery to remove the tissue in one of my knees. I currently wear a bulkier brace and am about to start college soccer. Would this brace fit with my injury and my level of play?
    • The Reaction Knee Brace is used to help the Pateklla track through the knee's range of motion in a natural fashion.
  • Shannel at 7/5/2012 7:31 PM
    • Hi,i have this brace and I use it during volleyball because I have patella dislocation in both knees however the brace has torn down the center.Is there some type of warranty to replace the brace with a new one?
    • Hi Shannel,

      The Reaction has a 6 month warranty. Please call customer care at 1-800-553-6019, they can help process an exchange.

      Have a nice day.
  • Scott at 6/5/2012 4:29 PM
    • Can this brace be used in watersports?
    • Yes it can.
  • A.J. at 6/1/2012 11:06 AM
    • I have tendonitis under my knee and MCL pain, my knee also pops easily would this brace help my knee and good for playing sport with?
    • Yes the Donjoy Reaction knee
      brace is sufficient for your condition and activity level.
  • Ray M at 5/23/2012 7:22 AM
    • i have been diagnosed with patella femoral syndrome in both knees. Supposedly no arthritis at age 59 per doctor review of X-RAY. Been taping, doing therapy for 7 weeks with PT supervision. I play 6
      hours of singles tennis every week . Pain level has deminished 50% since therapy but is definitely not gone. Still feel it up and down stairs, sitting in a restaurant. What brace do you perscribe to help me and why?
    • The Donjoy Reaction Knee brace would be appropriate for you and your condition and activity level.
  • Jeremy at 4/12/2012 1:11 PM
    • Is this brace left or right specific?
    • Hi,

      The brace can be worn on either leg.

      Have a nice day.
  • Scott Franklin at 3/26/2012 2:47 PM
    • My son plays high school basketball and he has been diagnosed by with patella instability which causes him a lot of pain. I am looking for a brace for both of his knees which will help his pain. What brace would you recommend.

      Scott Franklin
    • The Reaction knee brace would be appropriate for your son or the DonJoy Tru-Pull Lite. Both knee braces will help with patellar instability problems. The Reaction is also designed to distribute shock and force around the knee away from the painful areas. He might find a
      bit more relief while wearing the Reaction compared to the Tru-Pul Lite.
  • Loren at 3/9/2012 2:06 PM
    • I have a Donjoy Reaction brace and it does work well for my mild OA but I am expierencing migration down my leg with the lycra sleeve. If I wear it with out the sleeve It eats into my skin and is very uncomfortable. I also
      have tried a neoprene sleeve brace and it will not stay in place. Any suggestions.
    • There is a 90 day money back guarantee if the product is not working for you. For OA you may want to try the OA Fullforce if you are an athlete. Otherwise, the OA Adjuster or the OA Everyday (with no joint instability) would be recommended.
  • Carol at 3/9/2012 9:58 AM
    • Hi, I have knee tracking problems in both knees. 2 1/2 years ago I had microfracture, meniscus repair, and a lateral release on the right knee. I have a meniscus tear in the left knee. I am a tennis player and am experiencing soreness in both knees about an hour into playing and after I play. Would this be a good brace for me?
    • The Donjoy Reaction Knee Brace will provide support around your knee cap and moderate support to the knee in general, if you are getting a lot of instability or buckling of the knee joint you may want to try the Donjoy FullForce knee brace instead. That's best for athletes who have knee instability.
  • Madison at 3/8/2012 4:11 PM
    • I am 13 years old and play all sports. Track season now and summer I play a little softball and volleyball. I have Ogsgood-schalauters in my knee and was told I had arthiritis in my knee. I hurt my knee during the 200 sprint relay about a week ago and is giving me excrutiating pain. Would this be a good brace to have for all sports? Is it easy to run in? Light weight?
    • Yes the Donjoy Reaction Knee Brace would be recommended for your condition and activity level.
  • Cody at 2/17/2012 7:06 PM
    • Hi, I am 12 years old with Osgood shlatter and play lacrosse and football and was wondering if this brace would work for a contact sport?
    • Yes the Donjoy Reaction knee brace would be recommended for your condition and athletics.
  • Fran at 2/8/2012 6:41 PM
    • Does the undersleeve come with this brace when you order it?
    • Yes, one undersleeve comes with the DonJoy Reaction Knee Brace. We offer replacements if you ever need a second one or would like to have an extra while the other may be in the wash.
  • Catherine at 2/2/2012 4:50 AM
    • I am 48 year old female and walk 30 minutes a day. I used to run, but knee pain has limited me to walking or other non-weight bearing exercise. I have been using Hypafix and Leukotape to correct a patella tracking issue. This has been very helpful, but I was looking for something more long term. Would you recommend the Lateral J or the Reaction? Thank you!
    • The Reaction Knee Brace would be recommended for your
      condition and activity level.
  • Melissa at 1/30/2012 4:23 PM
    • My daughter plays high school soccer. Braces cannot have exposed metal parts, is this brace legal. She has chronic patella tendonitis, with her kneecap not being on track, will this help aleviate the pain?
    • Hi Melissa,

      Yes this brace is appropriate for soccer, there is no exposed metal. The web design helps with patellar tracking and will distribute shock and force across her knee as opposed to one area.

      If you have additional questions, please call 1-800-553-6019.

      Have a nice day.
  • Kevin at 12/14/2011 6:02 PM
    • I am a male currently on a professional stunt team (like collegiate cheerleading) and a competitive cheerleading team where I do a lot of stunting (tossing and holding one female standing in my hands over my head) and tumbling. I have had my ACL reconstruction once and scoped twice (meniscus tears). I have no stability issues in either knee, but both knees (
      specifically above and below the knee cap) have pain during and after these activities, patellar tendinitis, and osteoarthritis. Patella straps help some, but I have to wear one above and below the knee cap and add tape to get more coverage in both areas...this looks like it would provide plenty of pressure all around the knee (which is pretty much what I do with all the tape). I know I will never be pain free but will this help relieve some of that pain?
    • Yes the Donjoy Reaction Knee Brace would be recommended for you with your condition and activity levels.
  • Monica at 11/9/2011 3:24 PM
    • Hi,
      My 12 year old
      daughter has multi-directional patellar instability and Osgood-Schlaters. She has had her fat pad (ligamentum mucosa?) removed.We have this reaction brace, but it irritates the bump on her knee where the patellar tendon is pulling away and she won't wear it. I would like a support that has a little room for some growth. What do you recommend?

    • The Tru-Pull Lite or the Deluxe Donut may be better options for her to consider using.
  • nick at 10/13/2011 10:50 AM
    • i have a patella that keeps dislocating and a streched mcl in the same knee also. would the reaction knee brace be a good brace or what do you think would be the best? thank you
    • The Reaction, Tru-Pull Light or Hinged Lateral J would all be good options because they all have lateral patella buttresses to keep your knee cap in place and hinges to protect your MCL.
  • Cindy at 8/10/2011 1:44 PM
    • I am now wearing the OA Adjuster brace, and have been for two years. I have osteoarthritic in my right knee. Will the progressive pain relief brace help me better with the pain I am still having when I move around.
    • If you are still having pain and are already in an offloader this may not give the most relief for you. It may help some with the shock absorption, but will not offload any area.
  • Mom at 8/10/2011 10:05 AM
    • My daughter dislocated her patella playing volleyball. The ortho has recommended this brace. The players usually wear their kneepads just below the patella to help them slide when hitting the floor. The webbing on the front looks like it would prevent sliding, and maybe cause more injury? Would she be able to wear a kneepad over the brace? What's the best fix for volleyball?
    • Yes, I would advice her to wear a pad over the webbing. The webbing will prevent her from
      sliding. Another good brace for dislocations is our Tru-Pull Lite.
  • Jaz at 7/26/2011 5:34 PM
    • I note that it isn't designed for PCL injuries, however at the web design at the front of the brace look like it would aid in pulling the shinbones forward while reducing the force of knocks to the front of the knee.
    • The main benefit of the Donjoy Reaction knee brace is the relief at the knee cap and patellofemoral stress reduction, not PCL stability.
  • leonard at 7/26/2011 11:42 AM
    • i will be playing college football for the next 4 years. and i was just wondering about the overall durability of the DonJoy Reaction Knee Brace for practice and weightlifting use; how long would it last?
    • There is a 6 month warranty and that is how long we verify that the product will work.
  • Jaz at 7/25/2011 4:46 AM
    • Hello,
      I have a pcl
      injury. This product look like it wuould aid in bringing the shinbones forward and take pressure off my pcl, while providing some protection to the front of my knee to prevent further injury. Is that the case?
      I play semi contact sports so I cannot use the ligament braces because they may injure other players.

    • No the Donjoy Reaction Knee Brace is designed for Patellofemoral injuries not for PCL injuries. Actually the Armor would be the best Off the Shelf PCL brace for contact sports, you may use a sports cover to protect your teammates/opponents.
  • Anthony at 7/23/2011 8:39 AM
    • My Son suffers from patella tendinitis and Osgood-Schlatter disease would this brace be a good one for him to wear during his high school football games as a linemen?
    • Yes, this is a good brace for him to where for both of those knee conditions. It will help with the discomfort he gets, as well as still be functional enough for him to still move around in.
  • scott at 7/13/2011 4:18 PM
    • My measurement is 18-18.5" at 6" above mid-patella. Do I go high or low for a better fit?
    • Go with the M/L size.
  • Don at 4/21/2011 9:08 AM
    • My daughter has had an ACL replacement and is now suffering from pain due to what the doctors are calling runners knee, she plays soccer on her high school team and is very active
      She would need something that would allow her to run but still offer some support
      Is this the correct brace for that??

    • Yes, the reaction brace would be good for that condition. If she ends up thinking it's too much brace, you can try the Donjoy Cross Strap as well.
  • Mark at 4/18/2011 11:09 AM
    • Hi.
      Concerning the Donjoy Reaction knee brace, can you tell me what the hinges are made of and the side supports coming from the hinges? Thank you for your help,
    • The hinges are made of a flexible plastic.
  • ward davies at 3/16/2011 4:11 PM
    • I have severe minicus tears in both knees and I need a brace that keeps the knee from dislocating with any twisting movements. I have arthritis and overall degeneration..I've had surgeries to correct some of the damages (acl repairs,etc), but no knee replacements yet...this brace looks like it might offer me fairly good overall support. Am I correct?
    • This brace is mostly used for Patellofemoal issues, i.e. patella tracking, patella dislocations, & tendinitis, just to name a few. With the injuries and issues you have going on with your knees, and if you are active, I would recommend looking at a sturdier brace that will protect from dislocations, ligament problems, arthritis and degeneration. The brace that I would recommend would
      be the OA adjusted, it will help protect the ACL you have had repaired, as well help off load the torn meniscus that you have, and with the strapping and extension stops available, this brace will help prevent against hyper-extending the knee.
Reviews (45)


DonJoy Reaction WEB Knee Brace

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awesome brace! pain free after 10+ years!!

Reviewed by:
I have had chronic knee pain for years due to multiple basketball injuries and at the age of 30 I was constantly looking for relief as i knew i was way to young to have pain like this chronically. I am a full time paramedic and my job definitely made it worse. I got this brace and put it on right away, not even exaggerating i felt relief within 10 min, only mild pain remained. I have had it for a few days and i am happy to say i am pain free while wearing it! all other braces I've tried including ones prescribed by multiple orthopedists i would have thrown in the closet by now, but not this one! Five plus stars for sure!!!
Posted on August 26, 2015

best knee brace on market

Reviewed by:
i have ridden 50 days on this brace. it goves me the confidence i need to hit the mountains up HARD. i did lose 50 pounds and got this brace. first season on the board in 10 years. had major reconstructive surgery in 2010.

dont think twice about ordering one of these. i really hope DonJoy keeps this one around. i like buying bew gear each year. haha
Posted on March 24, 2015

torn meniscus knee support

Reviewed by:
I was recommended this knee brace while I was doing therapy to prevent surgery on my right knee from tearing the meniscus from a fall on the ice. it has been 6 weeks of therapy and I am doing fantastic with no more pain but not a hundred percent. I plan on about 2 or 3 more weeks of therapy and then I will be a hundred percent on my own and have still found this brace to be one of the best I have ever been told to use. I would recommend this to anybody who is willing to do the exercises needed first and follow any instructions from your doctor or therapist. I am a recovering stroke patient who has had many issues before this last minor setback and it has helped me even on my road to recovery from the stroke issues. it is not a brace that I am dependant it just is fantastic to have the support needed without even knowing you are wearing it. it is nowhere near like some of the others that is such a relief to remove it. D. W. H.
Posted on March 9, 2015

Benefits exceeded expectations

Reviewed by:
Although I have bone-on-bone osteoarthritis in both knees, wearing the DonJoy Reaction Web Knee braces reduced my knee pain by 75-80%. Wearing the braces also improved my balance and functionality.
However, depending on other factors like the weather and my level of activity, the relief was always not consistent. When that occurred, I did not wear the braces, rested my knees and then resumed wearing them.
Since I have to wear braces on both knees, the low profile, configuration and benefits of The Reaction Web brace proved it to be the best brace for me.
I am considering the Reaction OA brace to see if I might get support even during stressful events I experienced with the Reaction Web brace.
Posted on February 28, 2015

Overall a great product

Reviewed by:
After years of surgeries and trying many braces, I ordered this one and LOVED it from the moment I put it on. The knee pain is gone when I'm wearing it. And, I love the fact that it doesn't bunch up behind my knee when I am active. The only down side is that I have had the brace for only a little over 3 months and the velcro is no longer holding. I looked to see if I could order just the straps but don't seem to find it available to reorder. Hopefully since this seems to be the only common negative thing a majority of us have, they will work on a resolution. Overall, would buy it again in a heartbeat.
Posted on February 6, 2015

Great support, needs soft goods parts.

Reviewed by:
Much better than the post-op rig I had been in. Only issue is with daily use, the velcro ends up in the same place over and over and then no longer works. Would be nice to be able to buy the fabric back half as a replacement.
Posted on November 27, 2014

web great. need tubigrip or knit-rite undersleeves.

Reviewed by:
I wear these braces most of my waking hours-- both right & left knees. Web is terrific. Velcro is mediocre: loses its grip in a month or so. I use either Tubigrip, or Knit-Rite in a size which provides sufficient compression to push on the velcro & hold it in place. I use a length of brace undersleeve sufficient to be able to roll it up over the velcro tabs and push with adequate compression.
Posted on November 18, 2014

Worked like a miracle

Reviewed by:
I'm a volleyball player and have been suffering from severe knee pain for years. I've had many shots in the knee and I've tried several braces before but nothing helped the pain during play. So I was a little skeptical about all these good reviews but this brace worked like a miracle. I actually did not feel any pain during or after playing. I wish I had known about this product sooner. The only downside is that I have to wear it really tight in order to get a good support of patella. However, this is by far the best knee brace I've ever used.
Posted on November 9, 2014

Awesome Knee Brace

Reviewed by:
I had meniscus surgery and acl problems over 20 years ago. Years of playing sports really did a number on my knee. To the point where orthopedists just look and my xray now and shake their heads. I've tried shots and every brace known to man. This brace was the first one that actually relieved the pain. Its not a stabilizing knee brace but will relieved your tendinitis from the minute you put it on. I'm able to do hours of crossfit now even with my bum knee. I'm getting ready to buy another one because sizing was a little bit of an issue. Seems to run larger than the size says. AWESOME BRACE.
Posted on October 29, 2014

Mostly love it

Reviewed by:
I love this brace except for the fact that the velcro wore out so quickly and I have to use vet wrap to keep it from unfastening. Also, if your knee measures between sizes, be sure and order the smaller size.
Posted on October 29, 2014