The Persist was created for cyclist that look for a stylish helmet with a tailor-made fit. The adjustable VaporFit™ system provides a customized fit, while the MIPS® liner adds an increased level of protection. The Persist features 21 optimally placed vents that work with internal air channels to keep you cool and comfortable. The AirEvac™ system efficiently pulls hot air off of your eyewear to prevent fogging. Pass-through channels allow eyewear to be easily stored on the front of the helmet. Protection Lightweight in-mold construction MIPS® Brain Protection System reduces rotational forces caused by angled impacts to the head CPSC and CE EN 1078 certified AS/NZS263 certified Fit / Integration 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 VaporFit™ dial adjustment system offers 270-degree fit adjustment with the turn of a dial Features 21 fixed vents for consistent airflow Sweat-wicking liner insulates and fights odors Lightweight, low-bulk single layer webbing Weight (Size M, MIPS®): 11 oz / 300 g