Carhartt Men's Merino Wool Comfort-Stretch Steel Toe, Charcoal Heather, Sock Size:10-13/Shoe Size: 6-12 57% Merino Wool, 19% Acrylic, 15% Nylon, 8% Polyester, 1% 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