Pearl Izumi Men's Infinity In-R-Cool Cap Main: 100% polyester/UPF 50+ Side Panels: 100% polyester Technology: Icefil Imported Spring/Summer 2014 The mens Infinity InRCool Cap keeps the sun out of your eyes and your head cool with its InRCool equipped side panels and sweatband The perfect balance of anatomic fit, performance engineered materials and the personal interface between athlete and gear A clothing system that works to help you maintain the perfect temperature for the weather conditions and activity range day in and day out