Description of Under Armour ColdGear Mock - Boy's Under Armour's classic compression fit mock is ideal as a next-to-skin layer during cooler conditions to keep you warm and dry. Features: ColdGear double-knit fabric transports moisture to keep you dry Brushed poly inner traps heat to keep you warm Durable nylon outer 65% Nylour, 21% PolyArmour, 14% elastane