Fox Racing Youth Mainframe MIPS Helmet MIPS protection for young shredders The Fox Youth Mainframe MIPS is a trail-ready helmet that brings the safety features from Fox's high-end helmets to young riders of various experience levels. Extended coverage at the rear of the helmet protects riders from impacts to the back of the head, without adding excessive bulk. This helmet incorporates MIPS(R) technology, which disperses rotational forces during impacts, better protecting the brain and still maintaining a comfortably lightweight form. The Mainframe provides some of the best venting capability of helmets in this category, with large vents at the front and rear keeping things cool by optimizing airflow over the head, making those tough climbs just a bit easier. The Mainframe is a capable, comfortable helmet for new riders and advanced young riders alike. Features MIPS Technology reduces rotational forces during a crash Extra coverage on the back of the head Made for young riders with all of the same performance and safety features as the adult Mainframe Lightweight to reduce fatigue and increase performance Moisture-wicking inner liner can be removed and washed SPECIFICATIONSCore Material Molded EPS foam Closure system Clip Intended Use Youth, Trail, XCSizing Size One Size Head Circumference (cm)48. 25 - 52cm Head Circumference (in)19 - 20. 5" | Fox Apparel | Youth Mainframe Helmet In White