Mountain bike helmet suitable for men sizes 51 54 cm 55 58 cm 59 62 cm us sizes xss ml xlxxl xs s m l xl xxl main colour orange secondary colour white number of air vents 16 application all mountain visor with visor size adjustment headring features neck protection construction in mold outer material polycarbonate weight 340 g inner material polystyrene eps marks of approval cpsc en din 1078