Under Armour Men's Undeniable Mid Crew Socks 65% Polyester/24% Cotton/8% Nylon/3% Spandex Imported Left/right Technology for true anatomical fit Embedded arch support helps reduce foot fatigue ArmourDry material wicks moisture, accelerates evaporation ArmourBlock Technology helps prevent growth of odor-causing bacteria ArmourFit support in the key arch and ankle zones for tighter, more secure fit