Bamboo charcoal fiber is a highly elastic, comfortable, soft, breathable and environmentally friendly, will not harm the skin or cause allergy Provides extra support to knee joints so you can enjoy your favorite sport like basketball, football, volleyball, running, tennis, weight-lifting, and more With anti-slip design, the knee braces always stay in position during physical activity, protecting your knees from injury Ergonomic design, 360 perfectly fits your kneecap curve Specifications: Size: S, M, L, XL, XXL Material: bamboo charcoal yarn, cotton, latex silk, spandex Length: 27cm Leg circumference: S: 30-35cm, M: 35-40cm, L: 40-45cm, XL: 45-50cm, XXL: 50-55cm Package included: 1 x Knee Brace Other things not included