Experience unparalleled off-road performance with the comfortable fit and economical cost of Roost bike helmet. Features Created with an all-new, rounder head form for a more universal fit Mips rotational impact protection system In-molded upper and lower PC shells for an optimal protective structure at a light weight Optimized low and high EPS density Five-star safety rating from the Virginia Tech Helmet Safety Lab Easily accessible dual-arm, snap-on, three-position rear height adjustment Twelve oversized vents for maximum head-cooling air flow Supple and lightweight strap system