Mountain bike helmet suitable for men sizes 53 56 cm 56 59 cm 59 61 cm us sizes sm ml lxl main colour white surface matt number of air vents 22 application all mountain safety features mips brain protection system chin padding chin pad not inlcuded visor with visor detachable size adjustment double slide system features enhanced protection for back of head neck protection construction in mold outer materials carbon polycarbonate weight 360 g