Under Armour Boy Resistor 3.0 No Show Socks, Youth Large Nylon,Polyester,Spandex Imported Six-pair pack. No-sock sock sits below the ankle. ArmourBlock&reg; technology helps hinder the growth of odor-causing bacteria. Strategic cushioning absorbs impacting shock. Y-heel stitching. True Seamless Toe for enhanced comfort. 97% polyester, 2% spandex, 1% nylon. Machine wash cold. Tumble dry low. Imported.