UA Base™ 4.0 was designed to battle the coldest & most brutal conditions. Facing insane temperatures? This is what you’re gonna want to put on first.
- UA Base™ 4.0 delivers heat like no other, keeping you warm even in the brutal cold
- Soft, brushed negative grid interior traps hot air, providing superior warmth
- 4-way stretch fabrication allows greater mobility in any direction
- Moisture Transport System wicks sweat away from the body
- Anti-Odor technology prevents the growth of odor causing microbes
- 7.5 oz. Polyester/Elastane