Under Armour Men UA HeatGear&reg; Coldblack&reg; Golf Polo T-Shirt Loose: Full, loose fit for enhanced range of motion & breathable comfort no matter where your workout takes you. Revolutionary coldblack technology reflects IR & heat rays, so even dark color dont get as hot. 4-Way Stretch fabrication allows greater mobility in any direction. Moisture Transport System wicks sweat away from the body. Anti-Odor technology prevents the growth of odor causing microbes.