Under Armour Men&rsquo;s Coldgear Infrared Thermo &frac14; Zip ColdGear Infrared uses a soft, thermo-conductive inner coating to absorb & retain your body heat. Moisture Transport System wicks sweat away from the body. Contrast stitching. Anti-odor technology prevents the growth of odor causing microbes. Bonded hex-patterned fabric traps extreme heat without adding excess weight.