1、There is silicone ring cushioning pressure on the knees, spring support on both sides, multiple strengthening joint support, reducing knee load. 2、3D high-elastic fabric gives you more than just comfort, but also a gradient-level pressure on your knee load. 3、The inner side has a silicone strip anti-slip design, so you don't have to worry about slipping during the movement. 4、Ergonomically designed to promote correct knee movement as to prevent injury. 5、Suitable for basketball, tennis, volleyball, jogging, walking, hiking, etc. Product Name: Sports knee pads Material: nylon, spandex, silicon Design highlights: silicone gasket on the knee and spring support on both sides Protective part: knee joint Non-slip: anti-slip silicone ring on the inside to prevent slipping Size Information: Size   Length    Upper Circumference   Lower Circumference    Suitable for Weight M      28cm               34-54cm                      30-50cm                         50-65kg L       28cm               36-58cm                       32-54cm                         65-75kg XL     28cm               39-62cm                       34-58cm                         75-100kg 10cm≈3.94inch 1 x Knee Brace