The Nike Pro Combat Calf Sleeve is made with snug-fitting fabric and abrasion-resistant construction to help keep joints and muscles warm and supported during practice or game day.*Abrasion-resistant construction for minimal distractions*Lightweight Ariaprene keeps muscles warm while supporting joints*Contoured design for freedom of movement*Elastic binding and silicone grip for an optimal fit*Strategically placed mesh for breathability*40% Nylon, 21% TPE, 15% Polyester, 13% Silicone, 11% Spandex