Under Armour Men's Hike Heavy Wool Crew Boot Socks 41% Acrylic/34% Wool/19% Polyester/4% Nylon/2% Spandex Imported Heavy full cushion throughout provides maximum comfort and warmth Embedded arch support helps reduce foot fatigue Armour dry material wicks moisture, accelerates evaporation Armour Block Technology helps prevent growth of odor-causing bacteria CHARGED wool provides superior moisture management, insulation and comfort