Merrell Men's Pinawa Hiking Crew Sock, Dark Charcoal, X-Large 55% Merino Wool, 30% Nylon, 13% Nano-Glide, 2% Lycra Made in US Mesh zones for breathability Lightweight hiking crew Nano-Glide technology for friction-free comfort Arch band support to fight fatigue Fully cushioned footed buffers rough terrain Mesh zones for breathability