- 4-way stretch panels
- Anti-odor technology keeps your gear smelling fresh
- Brushed negative grid interior
- Moisture Transport System wicks away sweat
The Extreme Base layer has a soft, brushed negative grid interior to trap hot air, providing superior warmth. Anti-odor technology prevents the growth of odor causing microbes keeping your gear smelling fresh. Strategically placed 4-way stretch panels add stretch and dump excess heat. The Extreme is Under Armour's warmest base layer to keep you comfortable even in the extreme chill of a cold treestand.