The Under Armour Base 3.0 Long-Sleeve Crew Shirt delivers aggressive warmth in extreme cold conditions. Rugged 93% polyester, 7% elastane ColdGear thermal grid fabric traps heat in tiny pockets and circulates it to keep you warmer longer. Quick-drying construction transports moisture away from the skin to keep you drier, lighter, and more comfortable. Four-way stretch fabrication allows greater mobility and maintains its shape, while antimicrobial technology helps fight odors so you stay fresher longer. Flatlock seam construction and ergonomic seam placement help reduce chafing and allow for easy layering. Raglan sleeve construction provides a full range of motion in the arms for even greater comfort. Thumbholes at the cuffs seal in body heat for even greater warmth. Fitted design. Imported.