Terramar Men's Pinnacle Lite Sock (2-Pack) 48% Merino Wool/ 27% Nylon/ 23% Polyester/ 1% Spandex/ 1% Rubber Imported Toe has smooth flat seam for chafe-free comfort Merino wool for superior moisture management Heel and toe reinforced for durability Sole cushioned for shock absorption and abrasion prevention Machine wash do not bleach Toe has smooth flat seam for chafe-free comfort