Stay warm and fresh in extreme cold with the Under Armour Baselayer 4.0 Crew for women. This top is perfect for high-energy pursuits in cold environments - think frosty morning runs or snowy hikes. It's the warmest baselayer yet, thanks to UA Base 4.0 Extreme Baselayer technology. With UA Scent Control Technology, it helps keep you fresh during outdoor activities. The material not only wicks sweat and dries quickly, but also offers 4-way stretch for improved mobility. A fitted fit ensures it's not too tight or loose. Additional features include updated, softer fabric for enhanced comfort and built-in thumbholes to trap warmth.