UA Base 4.0 is built for extreme cold weather and lower activity. It uses a unique pattern that's designed to trap heat without adding bulk. Think long underwear, revamped for today's top athletes.
UA Base 4.0 Womens Half Zip UA Base 4.0 is our warmest baselayer for extreme cold Soft brushed grid interior traps heat and manages microclimate 4way stretch material moves in every direction Moisturewicking and quickdrying fabric UAScent Control Technology helps keep you undetected Generous half zip front for easy layering Raglan sleeves for better mobility and comfort
