72% Merino Wool, 26% Nylon, 2% Spandex||Mesh ventilation on top of foot for maximum breathability||Hi-splice nylon reinforcements in toe and heel for added durability where you need it most||Arch and ankle support for added comfort where you flex the most||Welted top keeps socks in place and fitting right||72% Merino Wool, 26% Nylon, 2% Spandex||Mesh ventilation on top of foot for maximum breathability||Hi-splice nylon reinforcements in toe and heel for added durability where you need it most||Arch and ankle support for added comfort where you flex the most||Welted top keeps socks in place and fitting right||Sizing: Small/Medium (Men's shoe 7-10); Large/X-Large (Men's shoe 11-15)view less