The Under Armour Womens Base 4.0 Extreme Base-Layer Leggings keep you warm in serious cold. Made of a polyester/elasterell blend, these leggings feature UA Scent Control Technology, a brushed-grid interior for heat-trapping performance, and a wide, flat waistband. 4-way-stretch allows freedom of movement, wherever the day takes you. The Under Armour Base 4.0 Leggings make frigid adventures more comfortable. Imported. Inseam: 29.5. Sizes: XS-XL. Color: Black/Pitch Gray. Type: Base Layer Bottoms.