Your favorite boots will be even more comfortable with Under Armour® Boot Socks. Embedded arch supports add extra cushion to high-impact areas of your feet. Signature Moisture Transport wicks moisture away from feet and accelerates evaporation. ArmourBlock™ helps stop odor-causing bacteria from developing. 69% polyester, 16% wool, 14% nylon, 1% spandex. Imported. Sizes: M-L. Colors: Black/Grey, Grey, Grey/Brown.