Under Armour ColdGear Outdoor Boot Socks are made of 41% olefin, 41% wool, 17% nylon, and 1% Lycra spandex for high performance in cold conditions. Fully cushioned footbed absorbs shock, while a fully reciprocated heel and toe with a flat toe seam provides a great fit and flawless performance in any weather. Per pair. Made in USA. Men's sizes: M-XL. Colors: Black, Olive.