Heat Gear Low Cut Sock 4 PK by Under Armour. Style number 3271. Perfect low cut sock for all sports that comes in a convenient 4 pack of either black or white socks. Features Under Armour’s peerless 97% Polyarmour (polyester), 2% Nylour (nylon), 1% Lycra Spandex performance fabric blend with superior wicking technology built into fabric. Cushion footbed for maximum shock absorption and protection. Fully reciprocated toe and heel construction. Flat toe seam for a perfect fit. Knit in arch support reduces foot fatigue while increasing blood circulation. Built in air channels to maximize ventilation. Odor controlled by preventing the growth of odor causing microbes. Wicks moisture away from the body, keeping feet dry. 4 Pack.