bicycle helmet 1.In-Mold,PC SHELL,Aerodynamic shell design 2.HIGH density EPS 3. ... release buckle 4.CERT.:CPSC/CE bicycle helmet1.The shell: In-Mold,PC SHELL,Aerodynamic shell design2.Buffer: HIGH density EPS, have ... buckle6.Homologation:CPSC7.Size:XS,S,M,L(54.~60CM IN-Mold bike helmet