Features 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. Specification 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 Package List 1 x Knee Brace