product Presentation :detachable Design, Easy To Convert Between Full Face And Half Facepc Shell And Eps Foam Absorb Shock And Impact13 Air Vents Keep Your Child Coolventilated Mouth Protectionthe Visor Increases The Shade For Your Child's Eyesthe Adjustable Dial Allows The Helmet To Adapt To The Size Of The Head: 52 - 56cmremovable And Washable Liner Keeps The Helmet Clean, Fresh And Odor-freeprotect Your Child When Cycling, Skateboarding Or Rollerbladingthis Full Face Helmet Is Constructed From A Hard Polycarbonate Shell With Shock Absorbing Eps Foam To Provide Maximum Protection For Your Children. It Has 13 Ventilation Openings, Ventilated Mouth Protection, Sun Visor, Adjustable Dial, Removable Liner And Many Other Benefits For Your Children To Enjoy. . The Helmet Is Also Detachable