Full face bike helmet mountain bike helmet suitable for men sizes 53 54 cm 55 56 cm 57 58 cm 59 60 cm 61 62 cm main colours grey black surface matt number of air vents 14 application mtb downhill chin padding with chin pad inner padding removable breathable visor with visor features chin ventilation forehead ventilation chin guard construction hardshell inner material polystyrene eps marks of approval cpsc en din 1078 ce