Through the use of In-Mould construction, the D-Slope is very lightweight & features a clean design that can be adapted to the needs of all youths, even the most demanding. The upper air intake provides ventilation & the rotor on the back allows for the size to be adjusted. The helmet comes complete with a visor strap on the back. Features Rotor size micro adjustment 6 air vents Active ventilation Goggles fastening system ITW Buckle Protection In-Mould Outer shell Polystyrene inner shell Homologation ASTM F-2040 EN 1077 type B