For growing kids ages 4 - 7. MIPS Brain Protection System. Fidlock magnetic buckle offers quick, secure fit that's easy for kids to close. In-molded EPS shell with full coverage for protection and durability. Easily-adjustable LockDown dividers provide clean helmet strap management. Reflective elements enhance visibility. Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership.