Mountain bike helmet suitable for men ladies sizes 52 56 cm 55 59 cm 58 62 cm 61 65 cm us sizes s m l xl main colour black number of air vents 13 application all mountain safety features mips brain protection system chin padding chin pad not inlcuded inner padding breathable removable washable size adjustments wheel adjustment system headring strap adjustable features enhanced protection for back of head constructions in mold microshell outer m