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Health & Beauty > Health Care > Supports & Braces 11-0215 in_stock 99.99

DonJoy Reaction Knee Brace

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DonJoy Reaction Knee Brace

Reduces pain caused by patellofemoral instabilities by dispersing energy across the knee.
$99.99 each

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Reduces anterior knee pain by dispersing energy across the knee.

The DonJoy Reaction knee brace utilizes an elastomeric web design, which absorbs shock and shifts the peak loads away from the painful area of the knee. This dispersion of energy helps reduce the anterior knee pain you suffer from.

Another advantage of the elastomeric web is it dynamically stabilizes the patella on all sides, thus bringing the patella into proper tracking position to reduce pain caused by general patellofemoral instabilities.

The DonJoy Reaction knee brace is extremely comfortable to wear because the open framework of the elastomeric web and mesh backing makes the brace breathable, unlike the traditional elastic and neoprene sleeves.


The DonJoy Reaction knee brace is used to treat or prevent the following injuries:

  • Chondromalacia patella
  • Quadriceps or patellar tendonitis/tendinosis
  • Osgood-Schlatter disease
  • General patellofemoral tracking issues
  • Mild OA

Product Features…and the benefits you’ll experience!

  • Progressive Pain Relief
    The web absorbs shock and shifts the peak loads away from the painful area of the knee and stabilizes the patella on all sides to ensure proper tracking position.
  • Sustained Comfort
    The open framework and mesh backing makes this brace breathable and comfortable during use.
  • Dual-Axis Hinges
    These hinges are flexible and work in conjunction with the elastomeric web for optimal fit and support, and providing energy dispersion to the knee.

Sizes: Available in sizes: XS/S, M/L, and XL/XXL and XXXL. Click on Size Chart tab above for sizing info.


Accessory: To Order the Reaction Knee Undersleeve Click Here




Shop our complete selection of knee braces or browse additional DonJoy products.

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"


4.8 10

DonJoy Reaction Knee Brace reviews

Christian
The brace worked great. It felt liked it helped me do the workouts on my knee better and with less pain. - Christian
David
Great alternative to a knee sleeve. - David
David
I found this brace relieved patellar tendon pain during stairs and standing squats. - David
Jamie
From the minute I put it on and walked, the pain was relieved. - Jamie
Cathy
This brace was comfortable to wear 2 weeks after Lateral Release surgery and easy to use. - Cathy
Destiny
I've had this for a year and have used it everyday for practice and soccer games. The velcro will eventually wear down and won't sick anymore, so I now have to tape it. I will have to order two more. One for each knee. - Destiny
Ronnie
My daughter's Oscgood Schlatter's pain has really improved since she started wearing this brace. A lot better than the McDavid knee brace we had bought at Sports Authority. Great job DonJoy - Ronnie
Middle Blocker Nate
Male 32 Years old. Volleyball Middle Blocker. Chronic Patellar Tendonitis (Tendonosis) I have tried the following to correct my issue: Platlet Rich Plasma Injections (4) 4 months of Preventative Physical Therapy with taping strategies Surgery to remove distal edge of patella and clean up tendon (followed by 6 mths PT) More braces and straps than I care to admit. This brace has been the most effective (and cost effective) way to correct my chronic issue. I can play in an all day Volleyball tournament (10 hours, 15 games) and the only thing that doesn't hurt is my knee. Its miraculous! I also wear one on the other knee to help with patellar tracking issues and mild subluxtions. Best Brace EVER. - Middle Blocker Nate
Parker
Great relief when I do Squats and no residual pain. Also able to stand on the sidehill with a radio without the killer pain later in the day. Worth every penny. - Parker
TJ
I injured my knee 4 months before my first marathon. Was able to complete the marathon using this brace. Helped stabilize my knee but wasn't too bulky or heavy. I'm continuing to use it but now 4 months later the velcro isn't fastening as well as it used to so I'll have to buy a new brace soon. - TJ

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Questions on DonJoy Reaction Knee Brace

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  • From ward davies at 3/16/11 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..Ive had surgery's 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. Im I correct?
    • The the DonJoy Reaction Knee brace is mostly used for Patellofemoal issues, i.e. patella tracking, patella dislocations, & tendonitis, 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 more sturdier brace that will protect from dislocations, ligament problems, arthritis and degeration. 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 menicis that you have, and with the strapping and extension stops available, this brace will help prevent against hyperextending the knee.
  • From Mark at 4/18/11 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.
  • From Don at 4/21/11 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??
      Thanks,
      Don

    • 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.
  • From scott at 7/13/11 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.
  • From Anthony at 7/23/11 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.
  • From Jaz at 7/25/11 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.

      Thanks.
    • 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.
  • From leonard at 7/26/11 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.
  • From Jaz at 7/27/11 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.
  • From Mom at 8/10/11 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.
  • From Cindy at 8/10/11 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.
  • From nick at 10/13/11 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.
  • From Monica at 11/9/11 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?

      Thanks,
      Monica
    • The Tru-Pull Lite or the Deluxe Donut may be better options for her to consider using.
  • From Kevin at 12/15/11 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.
  • From Melissa at 1/31/12 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.
  • From Catherine at 2/2/12 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.
  • From Fran at 2/9/12 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.
  • From Cody at 2/18/12 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.
  • From Madison at 3/9/12 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.
  • From Carol at 3/9/12 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.
  • From Loren at 3/9/12 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.
  • From Scott Franklin at 3/26/12 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.

      Thanks,
      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.
  • From Jeremy at 4/12/12 1:11 PM
    • Is this brace left or right specific?
    • Hi,

      The brace can be worn on either leg.

      Have a nice day.

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