point6 Men's Boot Ex-Heavy Crew Socks Wool 82% , Nylon 14% , Spandex 4% Made in the USA and Imported New Zealand merino wool socks: Wool - 77%; Spandex - 2%; Nylon - 21% Durable, long lasting and washable fabric. Breathable - help manage temperature and moisture Comfortable fit - offers maximum weight of cushioning for protection and comfort These socks will keep your feet nice and warm  they are antimicrobial and resist odor-causing bacteria Merino wool fibers are fine, soft and durable with next to skin comfort