Relentlessly innovative from lung searing cyclocross laps to long days filled with steep climbs the bell zephyr mips road helmet fits and feels so good that yoursquoll forget itrsquos there thatrsquos 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 d