- UA Base 4.0 is the warmest yet, locking in your body's heat to deliver extreme warmth in the extreme cold
- UA Scent Control Technology to keep you undetected in all pursuits
- Soft, brushed grid interior traps air against your skin, managing your body's microclimate to keep you warm and comfortable
- Material wicks sweat and dries really fast
- 4-way stretch material moves better in every direction
UA Base 4.0 is a men's baselayer 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 Extreme Baselayer is the warmest baselayer yet, locking in your body heat so you can keep going in extreme cold. UA Scent Control technology lets you take on any challenge with confidence. Soft, brushed, grid-patterned interior traps air against your skin to help keep your body's microclimate stable, keeping you warm and comfortable.
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