Meet the all-new UA Base™—delivering the same trusted warmth without the bulk—now softer and smoother than ever for unmatched comfort on every adventure.

• UA Base™ 4.0 Extreme Baselayer is our warmest yet, delivering extreme warmth in the extreme cold
• Material wicks sweat & dries really fast
• 4-way stretch material moves better in every direction
• Updated fabric with improved stretch is softer & smoother for maximum comfort and easier layering