Elite Hockey Pro-Liner Tube/Knee Socks, with Coolmax/Sport Rayon made from Bamboo and Lycra, are High-Tech tube Socks engineered with a blend of Extreme Moisture Wicking Sport Rayon made from Bamboo (also known as COOLMAX Active Fabric) and Lycra fiber for extreme moisture management, durability, and maximum comfort. Form-fitting and durable, these socks give you a thin second-layer feel while wicking moisture away from the skin. Also with a hand-sewn ultra-flat antifriction toe seam and a double welted EH cuff that keeps the sock comfortably in place. 67% Rayon made from Bamboo, 14% Rubber, 16% Nylon and 3% LYCRA fiber. Machine Wash (May arrive in either Black or Blue Official Elite Hockey Packaging)