Under Armour Men's ColdGear Infrared Run Beanie ColdGear Infrared technology - Helps to retain body heat. Moisture Transport system - Wicks sweat away from the body. Anti odour technology - Prevents the growth of odour-causing microbes. 360 reflectivity - Increases safety during low-light runs. Earphone comfort inserts - Allow for greater comfort when running with ear buds in.