Under Armour
Stay warm without sacrificing performance in the Under Armour Men's ColdGear Mock Long Sleeve Compression Shirt. Designed for training and competition in cold conditions, this premium baselayer features dual-layer ColdGear® fabric with a warm, brushed interior that retains body heat and a smooth, fast-drying exterior that helps keep you comfortable during intense activity. Advanced moisture-wicking technology quickly pulls sweat away from the skin, while four-way stretch construction allows unrestricted movement in every direction. The compression fit provides muscle support and a locked-in feel, making it an excellent choice for football, baseball, hunting, running, hiking, outdoor work, and winter training. A mock neck design offers additional coverage and warmth, while ergonomic flatlock seams help reduce chafing for lasting comfort. Whether worn as a standalone performance top or layered beneath outerwear, this ColdGear® compression shirt delivers dependable warmth, comfort, and durability. Shop authentic Under Armour cold-weather apparel at Simpson Outfitters for premium performance gear built for every season.