Kali Protectives US Savara Psycko Helmet Fiberglass shell with EPS liner Integrated Airflow System with 14 Vents Antibacterial, removable, washable liner Safety compliance: EN 1078 or CPSC, ASTM F2040, ASTM F2032, ASTM F1979 Size M fits head size 57 - 58 cm (hat size 7 1/8 - 7 1/4)