Proven protection proven style a team favourite across every sport with a durable outer abs shell and 11 open vents this helmet keeps your head safe and you looking coolshell high impact absvents 11 open ventscertification astm 14921447 cpsc 1203 asnzs 20632008 ce 1078high density injection molded abs shellhigh impact absorbing foam linersizings 54 56cmm 56 58cml 58 60cmxl 60 62cm