Under Armour Men's ColdGear Color Block Thin Over-the-Calf Socks (1 Pair) 82% Acrylic, 9% Polyester, 6% Spandex, 3% Nylon Imported Armour Dry wicks moisture, accelerates evaporation Embedded Arch Support helps reduce foot fatigue Armour Block helps prevent growth of odor-causing bacteria in the sock