what's it do?
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.
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