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 Extreme Baselayer is our warmest yet, delivering extreme warmth in the extreme cold
UA Scent Control Technology to keep you undetected in all pursuits
Soft, brushed grid interior traps air, managing your body’s microclimate to keep you warm & comfortable
Material wicks sweat & dries really fast
4-way stretch construction moves better in every direction
Wide, flat waistband with a rise that sits just right on your hips
Style #: 1343323
81% Polyester/19% Elastarell
Streamlined fit that’s not too tight or too loose.
Machine wash cold with like colors
Use only non-chlorine bleach when needed
Tumble dry low
Do not iron
Do not use softeners
Do not dry clean