When trail riding you want a helmet that can deal with every situation - ventilation for the climbs, lightness for all-day comfort and robustness in case you do have a spill. The Mavic Crossride MTB Cycling Helmet excels in all areas and looks the part too. Full rear coverage of the head makes it extremely strong and safe, while the 18 air vents and Crossride Fit pad with progressive cushioning keep you cool and comfortable.Ergo Hold SL Retention System for optimal adjustability, comfort and head hold Full rear coverage Removable visor 18 vents for ample breathability Crossride Fit Pad, one density progressive padding for a great comfort Weight: 7 oz. (size M) Sizes: S/20-22"; M/21?-23?"; L/22?-24"