Hinged knee brace that provides minor to moderate support for arthritic knees, ligament and cartilage damage Ideal for use during sports such as skiing with high knee joint impact With polycentric hinges to support the knee and prevent hyperextension Made from latex free neoprene with soft nylon cover Check product description for size guide. Measure around the knee for correct size. Fits left and right knee With it's supporting polycentric hinge, the McDavid 429 Knee brace is excellent at supporting your knee if you suffer from arthritis of the knee, damaged ligaments or need extra stability after knee surgery. The two hook and loop cross straps provide adjustable compression for enhanced join pain relief Ideal for use during sports activity, the nylon fabric outer is tough, durable and provides long lasting comfort Size Guide: Small 30-36cm (12'-14') Medium 36-38cm (14'-15') Large 38-43cm (15'-17') X-Large 43-51cm (17'-20') XX-Large 51-56cm (19'-22') If you are between size go for the larger size McDavid Sports protection and performance apparel are designed with the needs of athletes at their core. Providing a professional and everday solution to sprains and strains to amateur and professional athletes around the world, McDavid offers patented technologies to offer rehabilitation and support for all kinds of sports related injuries.