Bell stratus mips helmet joyridethe bell stratus mips road cycling helmet is a direct descendant of the pro level zephyr bringing the level of advanced engineering and design to a womens model the bell stratus mips helmet is the perfect combination of minimal weight aero efficiency and cutting edge comfort technologies to help you climb sprint or ride from dawn until dusk the float fit system offers comfort and security with a streamlined fit and a rubber coated dial thats easy to adjust