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 & more comfortable
4-way stretch construction moves better in every direction
Anti-odor technology prevents the growth of odor-causing microbes
Raglan sleeves
Flatlock seams eliminate chafing
Thumbholes keep sleeves secure & help seal in your body heat