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Reaction WEB Knee Brace


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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"
Ask A Question (98)

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DonJoy Reaction WEB Knee Brace

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Sort by Ascending
  • Kent at 10/5/2015 4:55 PM
    • I had ACL reconstructive surgery in March 2013. I am cleared for sports. I have some patella tracking issues. I ski and play basketball in my DonJoy Defiance knee brace, but feel this is a bit bulky. Plus I am 2 years out of surgery. Would this brace be a suitable alternative?
    • Kent
      The Reaction Web does not help to prevent further ACL injury but will help with patellofemoral pain and problems. The best prevention for further ACL injury is your Defiance
  • Bonnie at 10/1/2015 12:16 PM
    • Thigh measurement of just under 20 inches indicates a M/L for ordering this product. Is this considered between sizes and should actually order the XL for comfort/fit as recommended?
    • Bonnie
      The Reaction Web does run a little small so you may want to go a size up
  • CLH at 9/30/2015 2:39 PM
    • Hi. Hope you can guide me to the correct product. Dx: "abnormal morphology of midbody and posterior horn of medial meniscus consistent with meniscal degeneration and degenerative free edge tearing. " Some MCL edema from prior injury or tendinitis.
      I'm 55 yrs. old, 5'8", 230#. Pain in front of knee. Seems to reduce after 10 minutes of walking/elliptical trainer at moderate/brisk pace, but bad again soon after I stop at 60 min. Pain going down stairs, but not quite so bad going up. Also if bending knee at more than 90 º angle. Lateral movement causes intense pain front inside area.
      I want to be able to hike and bike again. Which product would provide the best support for me? Thanks.
    • The Don Joy Reaction Web Knee Brace will help to reduce that anterior knee pain while going up and down stairs. and while doing your activities. The brace is light weight and low profile. I think that this may be a brace for you to try
  • MLA at 9/28/2015 5:27 PM
  • jeff at 9/19/2015 12:58 PM
    • We already use this brace. Is the velcro strapping replaceable? If so where can it be found?
    • Jeff
      The soft back piece for the Reaction is not replaceable. If your brace is under warranty, the entire brace can be replaced.
  • Arzelius Payton at 9/11/2015 10:16 AM
    • Will this knee brace help with chondromalacia?
    • Arzelius
      Yes this brace will help with the pain associated with chondromalacia.
  • BreAnne at 9/2/2015 7:54 PM
    • I have alot of dislocation problems. All reasearch points to this brace. I rodeo and I would like a brace that goes over my jeans as they tend to bind up und my jeans when in the saddle. Is this a pull on brace or can it be unfassend
    • This brace is a wrap around so it will be easier to put over pants
  • Bethany at 8/28/2015 6:07 PM
    • I had a mcl knee strain a years ago that never completely healed and now my knee has lost almost all of its strength and support, and my mild impact knee brace isn't doing the job anymore. Would this provide a lot of support for my knee as well as support to my MCL?
    • No, this brace will not provide the support for the MCL that you need. You will need a hinged knee brace to provide that support. I would suggest the Economy hinged knee brace. If you feel that you need more support, the Playmaker II would be the next step up.
  • 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?
    • 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.
  • 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?
    • This brace is a patellofemoral 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 patellofemoral knee brace options.

  • 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.
  • 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.
  • 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.
    • This brace is going to be a step 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.
  • 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?
    • This brace was designed to decrease anterior knee pain caused by Patellofemoral disorders. The brace is very easy to apply and is very flexible and low profile.
  • 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.
  • 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?
    • Yes, 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
  • 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.
  • 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?
    • The Reaction will be a good 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?
    • The Reaction Web 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.
  • Bailey at 1/28/2015 12:22 PM
    • I do <a href="">competitive cheerleading</a> 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?
    • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 this brace right for me?
    • 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.
  • 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.
  • 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.
  • 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
    • I have this knee brace and it broke 4 times and all i do is play basketball with it. The plastic part to hold the straps to make it tight always snap. What other brace do you recommend?
    • Mikey
      The DonJoy Performer Patella Knee Support is a good alternative if you are having pain around the kneecap. The brace has a buttress that is sewn into the brace to help stabilize the patella. The Tru-Pull Lite is a good brace for keeping your knecap tracking in the correct position:
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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
  • 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
  • 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.
  • 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.
  • 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 1/12/2014 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
  • 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.
  • 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
  • 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
  • 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.
  • 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.
  • 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:
  • 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.

  • 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.
  • 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.
  • 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.
  • tim at 6/26/2013 8:52 AM
    • I am planning to buy the fullfource brace as i tore my acl and <a href="">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?

    • 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.
  • 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!
  • 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.
  • 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.
  • 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?
    • This brace would be appropriate for you and your condition and activity level.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
Reviews (48)


DonJoy Reaction WEB Knee Brace

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Reviewed by:
I received my Reaction Knee Braces this morning. The pain relief was immediate and the comfort and support are awesome. I couldn't hardly believe the superb results beyond my expectations. Wonderful product. Thank you, Donjoy. Customer service was extremely helpful answering my questions in selecting the proper braces, and the shipping was very prompt. The sizing procedure requires three accurate measurements -- at the thigh, at the kneecap, and at the calf. The braces fit perfectly. I've now had them on about four hours and the comfort is so great I hardly realize I'm wearing them! Such a wonderful improvement over "brand-x" that I previously wore,
Posted on October 5, 2015

Great product but needs enhancements

Reviewed by:
I LOVED this brace at the beginning. I have torn meniscus and it works like a charm for cycling, tennis and other sports. After a few months of use the rubber webbing tore and I am working to get a replacement. I have a second it already looks like its going to . I do wear it tight but that shouldn't matter. As others have said, the velcro also wears out if you are attaching it in the same spot (which naturally makes sense unless your knee changes size regularly:)). The technology is fantastic but the product longevity is poor which is the only reason I give it a 3
Posted on October 4, 2015

Great brace for injured dancers!

Reviewed by:
I'm a dancer, and I suffered two devastating injuries to the same knee: a tibial plateau fracture, followed a year later by a shattered patella and surgery. The knee is considered "healed" but there is still pain and instability, and the torque when spinning on the dance floor is murder. The knee either screamed in pain or collapsed under me. This brace solved those issues and allowed me to enjoy the dance floor again without much pain, and provides enough support to guard against a future injury.
Posted on September 3, 2015

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

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