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. Product Details: Protection: - Lightweight in-mold construction, Zonal KOROYD® coverage for lightweight, energy-absorbing, and ventilated impact protection - Mips® Brain Protection System reduces rotational forces caused by angled impacts to the head - CPSC and CE EN 1078 certified Fit / Integration: - Adjustable dial fit system for a customized fit - Designed for ultimate integration with Smith performance eyewear for maximum comfort, venting, and storage convenience - AirEvac ventilation system integrates with Smith eyewear for fog-free lenses Features: - 21 fixed vents for consistent airflow - Performance comfort lining - Lightweight, low-bulk single-layer webbing - Weight (Size M, Mips®): 11 oz / 300 g