Base Crew 4.0

Availability: In stock (1)
Brand: Under Armour

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 our 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, closely 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



  • 78% Polyester/22% Elasterell
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