Vents to keep you cool Super radical helmet has a molded 3D brow and knotted fabric sash! Shock-absorbing inner shell Easy to adjust chin strap CPSC 1203 Bike and ASTM F1492 Skate compliant I'm Raph. If there's a brawl, count me in. Leo loves to plan, but me? I'd rather fight first and ask questions later. If any shellbrains try to mess with me and my brothers, they won't know what hit them! Oh yeah, they will… ME. Thanks, Raph. Adults will want to know that the helmet is CPSC 1203 Bike and ASTM F1942 Skate compliant. It features a shock-absorbing inner shell, an easy-to-adjust chin strap, and aerodynamic cooling vents. Kids only care that it is super-radical and has a molded 3D mask and real knotted fabric sash! For ages 5-8 (50-54 cm).