- Fitted: Next-to-skin without the squeeze
- UA Base 4.0: Made for the most brutal cold around & low activity levels
- Thermal grid fabric traps heat in tiny pockets for long-lasting protection
- Quick-dry construction wicks moisture to keep you drier, lighter, and more comfortable
- Lightweight, 4-way stretch construction improves mobility and maintains shape
- Anti-microbial technology fights odors to keep your gear fresher, longer
UA Base 4.0: Mega-grid thermal fleece for the ultimate warmth in the brutal cold. Thermal grid fabric traps heat in tiny pockets for long-lasting protection. Quick-dry construction wicks moisture to keep you drier, lighter, and more comfortable. Lightweight, 4-way stretch construction improves mobility and maintains shape. Wide, flat waistband with a rise that sits just right on your hips.