Fast-paced lunch ride or weekend 60-miler, the Smith Persist road helmet is down for whatever you've got in mind. Designed to feel like it's tailor-made for your head, you can fine tune the fit on the fly with an easy to use dial adjuster. When you're sweating it out on the climb, 21 fixed vents and our AirEvac ventilation system keep the air flowing, your head cool and your glasses from fogging. Energy absorbing zonal KOROYD® complements Mips® Brain Protection System to reduce impact forces in the event of a crash and for the confidence to tuck every descent.