Under Armour 5529 Large Full Cushioned Men's Boot Socks 1x1 rib with Lycra spandex throughout leg Fully reciprocated toe construction with flat toe seam for perfect fit These Under Armour HeatGear socks have a fully cushioned footbed for maximum shock absorption and protection Knit in arch support, reduces foot fatigue while increasing blood circulation 86% Oiefin, 13% Nylour, 1% Lycra Spandex