Our most versatile sock system. Designed to provide exceptional softness, durability, and climate control. The natural qualities of wool substantially improve wicking action and moisture management, keeping feet drier and more comfortable. Heavyweight Over The Calf is made of 75% Merino Wool, 15% Nylon, 10% Lycra to offer maximum padding and foot protection. Lightweight Liner Sock is made from 75% Coolmax, 15% Nylon, 10% Lycra.