Under Armour Boys' ColdGear Armour Scent Control Mock 88% Polyester/12% Elastane Imported Exclusive UA Scent Control technology lasts longer & works better, keeping you undetected ColdGear Infrared technology uses a soft, thermo-conductive inner coating to absorb & retain your own body heat Dual-layer fabric with an ultra-warm, brushed interior & a smooth, fast-drying exterior 4-way stretch construction moves better in every direction Material wicks sweat & dries really fast