To help wearers, many supports feature compression straps, support stays, hinges or velcro closures The range is extremely comprehensive covering virtually every muscle and joint in the body. What's more, by using extensive customer research we know customers benefit more from supports that are sized to fit them. Knee Free support has a contoured 3-piece design providing a comfortable fit. Patella free opening with a stiched in butress which gives extra support to the patella. Cut out area helps deliver the optimum amount of pressure to the patella. Restricts movement of the patella. Helps to relieve the pain of the patella symptoms, unstable medial/lateral ligaments and cartliage damage. Sizing (measured in cm):XS: 26-30 S: 30-35 M: 35-40 L: 40-45 XL: 45-50