Short Description
The Donjoy Reaction Knee Brace is a shock absorbing knee brace that disperses loads away from the painful knee; developed by an orthopedic surgeon.
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The Donjoy Reaction Knee Brace is a responsive, webbed approach to anterior knee pain that provides a distinct alternative to the basic knee sleeve. The elastomeric web is an innovative solution that absorbs shock, shifts the peak loads across the knee, and dynamically stabilizes the patella to allow for comfortable, pain-free motion.
The Donjoy Reaction WEB knee brace is a fully adjustable, breathable solution for relief of pain that stays in place while walking, running, or playing sports. It's well suited for treating front of the knee pain like patellofemoral pain syndrome (PFPS), tendonitis, chondromalacia patella (runner's knee) mild cases of Osgood Schlater's disease, patella tendonitis, and more.
Donjoy Reaction Knee Brace Features:
- Innovative webbing framework redirects shock away from the painful area of the knee
- The open framework of the elastomeric web, in combination with the mesh backing, creates a comfortable fit and a breathable solution for relief of anterior knee pain
- Decreases knee pain by dispersing energy across the knee
- Flexible, dual-axis hinges are designed to naturally move with your knee joint to improve brace suspension
- Hinged knee brace bars contour to the shape of your thigh and lower leg for a better fit
- Brings the patella into proper tracking position to reduce pain; works for general patella instability
- Hinge bars attach to the rubberized web network to provide enhanced support with walking and running
- Straps above and below create a comfortable fit
- Used for a variety of knee injuries resulting in anterior knee pain (see indications)
- Reaction knee braces design fits right and left sides
- Available in three sizes - See Size & Fit tab for sizing chart and measurement/fit help
- Undersleeve included -Brace can be worn with or without it
- Weight: 0.5 lbs
The Don Joy Reaction Knee Brace Is Great For:
- Running
- Golf
- Skiing
- Walking
- Tennis
- Hiking
- Snowboarding
- Soccer
- Working Out
- Cheerleading
Recommended Manufacturer HCPC: L1810 and L1812
The Donjoy Reaction Web Knee Brace may be used for the treatment of:
- Chondromalacia patella
- Tendonitis of the Quadriceps and/or Patella
- Poor patella tracking
- Patellofemoral pain
- Anterior knee pain
- Mild Osgood-Schlatter Disease
Sizing Chart:
Measure the circumference of your thigh and calf six inches above and below the middle of your kneecap for the correct size:
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Undersleeve added here with the order
I love the brace. This is my second. The brace from DME-Direct included an undersleeve so it included some added value, whereas my last one from Donjoy's store did not come with one.

Found the brace in pink for my daughter
They had every color including the pink for my daughter which is super hard to find! We received our shipment the next day so my daughter had her brace in time for her club practice. We'll see how the web helps her knee in this weekend's soccer game.

Works good. Wrong color was sent though.
I ordered a red colored web but got a gray one. My knee gives out from time-to-time so I bought this to help keep my knee from buckling to quickly before I can catch myself--the brace works for that well enough. The item was shipped and received very fast!! I ordered it Friday after midnight (Saturday 1 AM) and it arrived on Monday--awesome.
Good product, good price
I have tried several upscale, more expensive braces. This Reaction is the best at relieving my knee pain(s). Totally satisfied!
Very satisfied!
Very happy with this brace. Easy on, easy off. Helps greatly with my OA pain. Great customer service, good price. Would recommend to anyone!
Good product, good price
I got 2 of these because I have severe OA. A hiccup in the supply occurred due to the coronavirus catching the manufacturer, but DME-Direct handled it well and informed me of the slight delay which I appreciate. Satisfied customer - I would recommend these folks to others!
Great price
Was looking for free shipping and the best price for a new Donjoy reaction knee brace for sale and found your website. Bought the XL/XXL and it's fitting perfectly. Thanks.
Excellent knee support. Lightweight and flexible
This design is perfect for my patellar tendonitis. I had used a Cho-Pat double-action strap for years for the same issue so that I could get around at work and felt more pain as a result. I went to Don-Joys' website and confirmed their sizing instructions with what is presented here (100% accurate I might add) and it's a great fit. I probably need surgery in the future but for right now I can still do everything I need to do with less pain.
Knee Feels Really Good
I purchased on the advice of my doctor and have been using it when I play sports like soccer and running to relieve pain I've had from dislocating my kneecap. I got the medium size and found the sizing chart to be accurate for my measurements. I'm very happy with how it has lasted with almost daily wear, and the amount of money I paid. The same Donjoy Reaction knee brace at Amazon was more expensive.
Using my Reaction knee brace for skiing
I bought this Donjoy Reaction knee brace for skiing and have used it now 6 times out on the slopes. It fits underneath by skiing bib stays in place very well. I had to adjust it maybe twice the entire day but was very happy with it and it relieved my pain from an old skiing accident very well. Good purchase. Received the brace the following day.
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DME-Direct is a Donjoy Authorized Dealer Site
Donjoy believes that the best way for you to select and purchase a Donjoy product is at one of its authorized online stores of which DME-Direct is one. Only in these stores can you be sure to find the latest Donjoy collection and ensure you are getting a genuine Donjoy product with the manufacturer's full warranty.
Donjoy therefore recommends that you do not purchase a Donjoy item through any website, unless it is an authorized Donjoy dealer.
We are a Donjoy Authorized Dealer and can assure you a safe and pleasant shopping experience here at our website as if you were at our wholesale distribution premises in Valencia, California.
Some non-authorized sites sell counterfeit, second-hand merchandise, and/or products containing old fabrics, glues, and resins that do not perform as intended, and are therefore, not eligible for care under the Donjoy warranty. Others do not offer the original Donjoy warranty, nor do they offer any after-sales service of any kind.
Donjoy takes great care to ensure that all Donjoy authorized dealers offer you the very best products and service. Please take advantage of the peace of mind that only they can offer to Donjoy purchasers.