The Under Armour Mens ColdGear Base 4.0 Series Packaged Quarter-Zip Long-Sleeve Pullover has been completely reengineered, totally rebuilt, and is still best in class. UA Base layers are designed to keep you warm, no matter how cold it gets the higher the number, the greater the warmth. The warmest of the Under Armour base layers, Base 4.0 locks in body heat for extreme warmth in extreme cold. 100% polyester material wicks sweat and dries really fast, and its 4-way-stretch fabric moves easily in every direction. A soft, brushed grid interior traps air against your skin, closely managing your bodys microclimate to keep you warm and comfortable. UA Scent Control Technology helps keep you undetected as you scout or hunt. Under Armour ColdGear Base 4.0 Series Packaged Quarter-Zip Long-Sleeve Pullover boasts flatlock seams for against-the-skin comfort, as well as a quarter-zip placket for easy on/off and quick venting of excess heat. Machine wash. Imported. Sizes: S-3XL. Color: Black/Pitch Gray. Type: Base Layer Tops.