Point6 Hiking Essential Medium Crew Socks - New Zealand merino wool socks: Wool - 70%; Spandex - 5%; Nylon - 25% - Durable, long lasting and washable fabric. Breathable - help manage temperature and moisture - Comfortable fit - offers extra cushioning on the instep and around the leg to protect against pressure points from heavier footwear - 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