Race cycling helmet suitable for men sizes 51 55 cm 55 59 cm 59 63 cm us sizes s m l main colour black surface matt number of air vents 24 applications road x country triathlon cyclocross touring chin padding chin pad not inlcuded inner padding antibacterial breathable removable washable visor without visor size adjustments height adjustable wheel adjustment system headring strap adjustable features carbon reinforcement construction in mold