Knee brace for osteoarthritis - OA Donjoy reaction web The OA Reaction Web knee brace represents an innovative and ultra-light solution for the treatment of pain related to osteoarthritis of the knee. The technological heart of this device is its patented mesh structure, made of medical-grade silicone, which acts as a dynamic shock absorber. This elastic mesh has the ability to absorb impact energy and redistribute the load away from the areas of the joint most affected by wear, offering immediate and constant relief during walking and daily activities. The design is designed to guarantee maximum discretion and breathability. Thanks to its open architecture, the brace promotes continuous air flow, making it much cooler than traditional tubular neoprene models. This makes it particularly su.