Carhartt Men's Arctic Heavyweight Wool Boot Socks 68% Wool, 23% Nylon, 8% Other fiber, 1% Spandex Made in the USA or Imported Pull On closure Machine Wash Comfort Stretch Top prevents falling, pinching, or binding Merino wool and Coralast Abrasion Resistant fibers create an Ultra Comfortable, Long lasting work sock FastDry technology quickly moves sweat Compression arch Odor control keeps socks feeling fresh