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 UA’s warmest yet, delivering extreme warmth in the extreme cold
• UA Scent Control Technology to keep you undetected in all pursuits
• Soft, brushed...(Continue reading)