The MERINO HIKER was developed as a lightweight outdoor sock. This sock provides Double Layer protection in a medium weight ideal for all seasons. Feet stay dry as the CoolMax wicks the moisture away from the foot and into the outer layer for evaporation. Blisters are prevented as the layers move slightly to absorb friction.This is flat knit sock making it less bulky. The prefect combination of tech and comfort makes it ideal for four season wear. Fabric: Inner Layer 70% CoolMax®, 30% Nylon Outer Layer 68% Merino Wool, 24%Nylon, 4% Lycra®