Mountain bike helmet suitable for men sizes 52 59 cm 60 64 cm main colour black number of air vents 15 safety features fly net reflective print safety light rear visor with visor size adjustment wheel adjustment system construction in mold weight 255 g helmet technologies met in mould intelligent fusion met safe t twist 2 met safe t e twist met nova3 design marks of approval asnzs 2063 en din 1078