Under Armour Base 3.0 Crew base Layer Shirt. Made with a polyester, elastane blend, the Base shirt is fitted against your body and traps in heat to shield against the chill. coldgear technology delivers warmth without the bulk so you can wear a shirt and jacket comfortably over the base layer.
UA base 3.0 is built to fight the bitter cold without weighing you down
Soft, brushed negative grid interior traps hot air, providing superior warmth
4-way stretch construction moves better in every direction
Material wicks sweat and dries really fast
Anti-odor technology prevents the growth of odor-causing microbes