Bell Shield Child Helmet, Purple/White Vented EVA-lined chin bar surrounds the face for additional coverage and protection Built-in cheek pads provide a secure fit;Side-squeeze buckle makes for easy adjustment Caged venting - 8 hexagon covered vents for a much cooler ride Fits head sizes: 52-56 cm Comfortable neck roll for increased padding and correct positioning Hardshell construction for dual certification: CPSC bike and ASTM F1492-08 skate compliant