Under Armour Adult Resistor 3.0 Crew Socks (6-Pack) 98% Polyester/2% Spandex Imported Strategic cushion reduces bulk and delivers flexibility Precision y-heel pocket improves fit and enhances comfort ArmourDry material wicks moisture, accelerates evaporation ArmourBlock technology helps prevent growth of odor-causing bacteria in the sock Dynamic arch support help DS reduce foot fatigue