The Under Armour Men's ColdGear Infrared EVO ColdGear Long Sleeve Mock isn't your old school mock turtleneck. But you knew that. Use it to layer up or wear it on its own. Either way, you'll be ready for the weather's worst, with a soft, brushed inner layer that circulates heat, and an element battling outer layer that keeps you dry and protected. UA's patented ColdGear Infrared technology the pattern on the inside actually holds onto your body heat, making everything warm up faster and stay that way longer. ColdGear Infrared: Inspired by stealth bomber technology, Under Armour created ColdGear Infrared that's coated with a thermo conductive ceramic pattern that captures your own warmth and reflects it inward. Extremely light, incredibly warm, totally stealth. Constructed of 89% polyester, 11% elastane fabric. Dual layer fabric gives you an ultra warm interior and a slick, fast drying exterior. ColdGear Infrared printed interior. Signature Moisture Transport System wicks sweat away from the body. 4 way stretch fabrication allows greater mobility and maintains shape. ArmourBlock anti odor technology prevents the growth of odor causing microbes. Smooth, chafe free flatlock seam construction. Fitted designed to be very close to the body without the constriction of compression. Import.