Under Armour Cushion Boot Socks, Black, Large (10-13) 41% Olefin, 41% Wool, 17% Nylon, 1% Lycra Spandex Made in US Charged wool provides superior moisture management, insulation and comfort Embedded arch supprt helps reduce foot fatigue ArmourDry material wicks moisture, accelerates evaporation ArmourBlock technology helps prevent growth of odor-causing bacteria Strategic cushion protects high-impact areas of feet