Mountain bike helmet bmx helmet full face bike helmet suitable for men ladies sizes 58 61 cm 54 58 cm 52 56 cm us sizes l m s xl main colour black surface matt number of air vents 14 application freeride safety features reflective print chin padding with chin pad inner padding washable removable visor with visor detachable size adjustments height adjustable wheel adjustment system features chin guard removable chin guard construction in mol