Under Armour ColdGear Base 2.0 Legging Thermal Underwear Under Armour's most versatile relaxed fit UA BASE legging. Ideal for cooler conditions and a variety of activity levels. Mid-weight ColdGear grid fabric construction provides exceptional temperature control and moisture transport via heat-trapping interlocking channels. Ergonomically placed flatlock stitching and working fly enhance mobility and functionality. ArmourBlock technology stops odor causing microbes for maximum scent suppression. 93% 4.5 oz PolyArmour / 7% Elastane. Imported.