The Under Armour ColdGear® Armour Mock long sleeve shirts are a compression, ultra-tight, second skin fit. These compression shirts have dual-layer fabric with an ultra-warm, brushed interior and a slick, fast-drying exterior. The 4-way stretch fabrication allows greater mobility in any direction and anti-odor technology prevents the growth of odor causing microbes. The Moisture Transport Systems wicks away sweat and dries fast. The smooth, flatlock seam construction is chafe-free and the updated ergonomic mock neck has an Armour wordmark on the back.