Features11. Three-in-one multifunctional sports helmet with integrated backlight, switchable protective cover and detachable sun visor. The integrated taillights ensure improved safety and visibility on the road. Using our spare sun visors and eyepieces, they perform well during transportation. 22. 230 grams, one size: Free size M/L (54-61cm) 33. Shell structure: In-mold polycarbonate shell with EPS lining; inner shell: thermoformed reinforced shock-absorbing polystyrene. 44. Ventilation: 22 ventilation holes with internal channels. 55. Comfort: Super fit for Asian and Western head shape design. Wearing comfort. 66. Safety: Helmets are used for 5 years old and above for riding, helmets used with skateboards and skates.SpecificationProduct: Cycling helmetApplication: road mountain bikeMaterial: Shell imported PC + internal imported EPSTechnology: In-MoldColor: 5 colors are availableSize: M/L (54-61cm)Inner width 17.5cmWeight: 230gVentilation holes: 22pcsConstruction: External in-mold (integrated molding) impact resistant PC, internal EPS integrated molding to absorb impact technologyPackage List1*helmet