GMAX MX-46 Compound HelmetDescription: Featuring a single Youth shell size, the MX 46Y can be custom fitted from Youth Small up to Youth Large with just padding kit changes (sold separately). This way the helmet can grow as they do. 19 Vents create maximum airflow, keeping you cool and comfortable lap after lap. Features: DOT Approved One shell can be adjusted to three different sizes so the helmet can grow as your child grows Maximum air flow is achieved through industry