The Nike Pro Combat Calf Sleeve provides breathable support and promotes healing without sacrificing freedom of movement. Excess heat is released through strategically placed mesh for added breathability. Lightweight AriapreneŽ material keeps muscles warm without sacrificing joint support. Contoured design adds freedom of movement for superior performance. A silicone grip and elastic binding offer a secure fit and optimal comfort. 36% nylon/24% polyester/18% TPE/12% silicone/10% spandex.