SmartWool Men's PhD Ski Light Socks - Past Season 63% Merino Wool, 35% Nylon, 2% Elastane Knit in USA Built for Performance in the Highest Degree, Uses two elastics for greater stretch and recovery to keep the sock in place, Patented ReliaWool technology in high impact areas provides superior durability, Men's-specific mesh ventilation zones provide additional breathability and moisture management, Light cushioned shin and sole for impact absorption and warmth Flat knit durable toe seam Sock Height: Over the Calf, 14" overall height Style: SW0SW005