Relentlessly innovative. From lung-searing cyclocross laps to long days filled with steep climbs, Zephyr fits and feels so good that you’ll forget it’s there. That’s the whole point. The most innovative road cycling helmet Bell has ever created follows years of research, analysis and real-world testing. The result? An uncompromising combination of performance. It starts with Progressive Layering technology, a joining of two EPS segments that have different densities to help manage impact energies. The overall shape, tested and re-tested at Bell's world class test lab, combines all-around aero performance with head-cooling ventilation. And the new Float Fit Race retention system, featuring height and width-adjustable cradles and an easy-to-turn dial, is optimized for the new Integrated MIPS system. Together, they create a brilliantly streamlined solution to reducing rotational forces with zero compromises in comfort and fit. Just what you need for your longest, hardest days in the saddle.