Kali Protectives Chakra Girl's Diamond Bike Helmet, Pink COMPOSITE FUSION TECHNOLOGY - In-molding technology merging the shell and EPS foam liner. Better impact energy management, increased dynamic range - smaller, lighter and stronger FEATURES - Anti-Microbial Pads, Breakaway Visor, and 21 Vents MATERIALS - PC Shell and EPS Foam RETENTION - Dial-Fit Closure System CERTIFICATIONS - EN 1078, CPSC Ultra lightweight Polycarbonate Shell Low density EPS Foam for Impact Absorption Expanded Rear Coverage Design Breakaway Visor Youth fits 52-57 cm (hat size 6 1/2-7 1/8)