UNDER ARMOUR Men's Tactical ColdGear Infrared Base Black Crew Neck Top (1365389-001)

ColdGear Infrared lining uses a soft, thermo-conductive inner coating to absorb & retain body heat; Dual-layer fabric with an ultra-warm, brushed interior & a smooth, fast-drying exterior; 4-way stretch material moves better in every direction; Material wicks sweat & dries really fast; 87% Polyester/13% Elastane