Pro-Level Fit for the StreetThe Span shows up on the scene with a modern twist on skate and BMX style. The fit is tight and right, and with a dial-adjustable fit system, this thing is staying put, no matter how rad you get. Availability, certification, color, and pricing may vary per region. If outside of the USA, please check with your authorized local dealer for more information.Key Features:Circumference: 49-53 cmConstruction: ABS hard plastic shell with EPS linerFit System: Action FitProduct Weight: CPSC: 445g (Size M)|CE: 428g (Size M)Certification: Complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and OlderASTM F1492-08 (Skate)