UA Base 3.0 is built for very cold weather and moderate 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™ 3.0 All Season Baselayer provides midweight warmth at many activity levels & cold temperatures
• 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 material moves better in every direction
• 81% Polyester/19% Elastarell