Thorlos Unisex TRHXM Trail Hiking Thick Padded Crew Sock 77% Exclusive THORWICK COOL, 16% stretch nylon, 7% spandex Made in US Machine Wash Fiber Contents: 59% Thor-Lon Acrylic, 20% Thor-Wick COOL polyester, 15% Nylon, 6% Elastic Features Exclusive Thorlo clinically-tested padding shown to reduce pain, pressure, blisters, and moisture Designed specifically for a woman's foot with a smaller heel and arch for a better fit Low profile seam won't rub or irritate feet Made in Statesville, North Carolina U.S.A.