RedHead Ultimate Wool Heavyweight Socks for Men bring together long lasting durability and top-notch merino wool performance and comfort together in 1 sock. This high performance sock puts fine grade, itch-free Merino wool against the skin from top to toe for great thermal regulation and all-day comfort. Made of a Merino wool/nylon/Kyorene nylon/Lycra spandex blend, the sock's tough and durable exterior features graphene nylon reinforcement for long term wear. Flat toe closures resist binding and blisters, while the sock's arch support helps you fight off foot fatigue through the day. 82% Merino wool/14% nylon/3% Kyorene nylon/1% Lycra spandex. 82% Merino wool/14% nylon/3% Kyorene nylon/1% Lycra spandex Long lasting durability with Merino wool comfort Inner wool layer for thermal regulation and all-day comfort Durable exterior features graphene nylon reinforcement for durability Flat toe closures Arch support