Under Armour's Base 2.0 is built for cold weather and high activity levels. It uses a unique pattern that's designed to trap heat without adding bulk. Think long underwear, revamped for today's top athletes.

Features:

• UA Base 2.0 Active Baselayer is lightweight, flexible & breathable for high activity in cool conditions
• 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