Mountain bike helmet suitable for men sizes 51 55 cm 55 59 cm 59 63 cm main colour white surface matt number of air vents 17 applications all mountain touring chin padding chin pad not inlcuded inner padding antibacterial breathable removable washable visor with visor size adjustments wheel adjustment system headring construction in mold outer material polycarbonate inner material polystyrene eps helmet technologies giro roc loc 5 giro roll cag