The giro savant road bike helmet has been designed to give you race inspired performance at unbeatable value great features such as in mold construction enabling increased ventilation without compromising the strength and durability of the overall helmet the 24 wind tunnel vents have inter channelling to further increase ventilation even while attacking the hardest uphill climbs this giro road bike helmet with four super fit engineered sizes and roc locreg 5 fit system offers yo