Under Armour Men's HeatGear Crew Socks (3 Pack) 49% Polyester/35% Cotton/14% Nylon/2% Spandex Imported Athletic crew socks Moisture Transport System wicks sweat away from the body Anti-odor technology prevents the growth of odor-causing microbes Embedded arch support reduces foot fatigue Seamless toe & contoured "Y" heel for the perfect, comfortable fit