When the temperature dips, keeping your head warm is the key to whole-body temperature regulation. Our new ThermoNet?„? Hat provides maximum protection from the cold with a breathable, durable PrimaLoft?®? yarn that is four times warmer than regular microfiber. The result of years of research and testing, the ThermoNet?„? Hat wicks moisture away from your skin while trapping heat inside, keeping your head comfortable and dry in even the most frigid winter weather.