Kids helmet suitable for boys sizes 44 49 cm 46 51 cm 49 53 cm 52 58 cm main colour green number of air vents 8 safety features fly net safety light rear size adjustments headring wheel adjustment system features chin buckle snap enhanced protection for back of head lower edge reinforcement construction co mold weight 220 g helmet technologies ked maxshell ked quicksafe ked quickstopp theme crocodile