ColdGear® Infrared Crew Top The Under Armour Coldgear Infrared Crew Running Top's ColdGear® Infrared technology uses a soft, thermo-conductive inner coating to absorb and retain your own body heat, keeping you heated in case the temperature drops. this is constructed from an embedded ceramic material, compressed within a distinctive pattern to deliver thermal properties that wont diminish or reduce. Moving into comfort, the tops amazingly soft, smooth fabric offers total comfort in a 4-way stretch fabrication, this allows greater mobility in any direction, acting upon torsion for full flexibility without compromising the shape and form. This coincides with Smooth, chafe-free flatlock seam construction, enhancing the fit and feel that will propel your performance to the next level. Lastly the top is embedded with a Moisture Transport System, actively working to wick sweat away from the surface of the skin, leaving you feeling dry and comfortable while Anti-odour technology prevents the growth of odour-causing microbes, letting you feel fresher for longer. Graphic Specification: ColdGear® infrared technology.