Featuring Infrared technology, Under Armour's Evo Mock is a superlight ColdGear baselayer that warms up faster and holds heat longer to keep you ultrawarm. . Dual layer fabric gives you a soft, heat trapping interior and a smooth, fast drying exterior to keep you warm and comfortable. ColdGear Infrared printed interior uses a soft, thermo conductive inner coating to absorb and retain your own body heat. 4 way stretch fabrication allows greater mobility and maintains shape. Moisture Transport System wicks sweat away from the body. Quick drying fabrication keeps you light and comfortable. Anti odor technology prevents the growth of odor causing microbes. Flatlock seam construction for a smooth fit and chafe free comfort. Fitted: Sits close to the skin for a streamlined fit without the squeeze of compression.