Carhartt Men's Merino Wool Steel Toe Crew Socks 56% Wool, 19% Acrylic, 14% Nylon, 8% Polyester, 2% Spandex, 1% Lycra Spandex Made in the USA and Imported Pull On closure Machine Wash Super Abrasion-resistant cora last yarn for maximum durability and protection Fast dry technology wicks away sweat so socks stay dry Antimicrobial technology fights the toughest odors Wool blend regulates temperature for comfort Non-binding comfort-stretch top