Under Armour - Women's Tactical ColdGear Infrared Base Crew

ColdGear Infrared® technology holds in body heat, without adding weight or bulk. It's a special, soft print on the inside and it keeps you warmer, longer, so you can work out in the bitter cold.

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