MET Rivale II MIPS Road Helmet White Holographic MISC Uses a common CR2032 battery PSI SRAMSALE Uses a common CR2032 battery that lasts for 200 riding hours and changes without tools this meticulously crafted disc brake rotor from SwissStop brings an excellent braking experience The front of the helmet is designed with wider and longer vents which improve the ventilation and they can also serve for securely docking sunglasses The rear of the new Rivale Mips has a singular MET signature style – especially the NACA Vent built in with lower and tube shaped profile which makes the Rivale Mips more aerodynamic than its predecessor