UA Base 4.0 was designed to battle the coldest and most brutal conditions. The patented negative grid traps ridiculous warmth without adding excess weight. Facing insane temperatures? This is what you’re gonna want to put on first.
Base 4.0 Crew Fundamentals
- Fitted: Sits close to the skin for a streamlined fit without the squeeze of compression.
- 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 and maintains shape
- Signature Moisture Transport System wicks sweat away from the body
- Quick-dry fabrication keeps you light and comfortable
- Anti-Odor technology prevents the growth of odor causing microbes
- Raglan sleeve construction and flatlock stitching allow a full range of motion without chafing
- 7.5 oz. Polyester/Elastane