Mountain bike helmet suitable for men ladies sizes 47 51 cm 51 55 cm 55 59 cm 59 63 cm 61 65 cm us sizes xs s m l xl main colour black number of air vents 16 applications all mountain dirt safety features mips brain protection system chin padding chin pad not inlcuded inner padding antibacterial breathable removable washable visor with visor adjustable detachable size adjustments wheel adjustment system strap adjustable features neck protecti