Lorpen Men's Trilayer Light Hiker Sock 10% lycra Men's trilayer light hiker Trilayer knit technology layers both synthetic and natural yarns in a way that improves moisture management, comfort and durability 50% coolmax, 25% tencel, 15% nylon, 10% lycra Eucalyptus is primarily used to produce the Tencel fiber. Crew height, Partial light cushion