Versatile road helmet with a new level of performance for the price Acu-Dial fit system provides one handed micro adjustment whilst on the move & ensures a perfect custom fit for every rider Advanced strap management keeps everything in place to allow further fine tuning for a safe & secure fit In-mould hard-body adds strength & protection for no extra weight penalty 20 vents allow cold air in & hot air out to provide cooling & increase rider comfort Additional rear exhaust vents help pull air through the helmet even when riding uphill & at slower speeds Meets CE EN1078 certification