Under Armour ColdGear Base 2.0 Crew Thermal Underwear Under Armour's most versatile relaxed fit UA BASE crew. Ideal for cooler conditions and a variety of activity levels. Mid-weight ColdGear grid fabric is engineered for heat-trapping core temperature and fast drying moisture transport. Raglan sleeves and ergonomically placed flatlock stitching enhance mobility for superior fit and comfort. ArmourBlock technology stops odor causing microbes for maximum scent suppression. 93% 4.5 oz PolyArmour / 7% Elastane. Imported.