Duratec Spirit Helmet MediumDescription Duratec finish provides improved scratch and dirt resistance with a rich matte finish. DialFit technology permits quick and precise helmet adjustment for personalized comfort. FlexVisor, molded from flexible polymer, wont shatter into sharp pieces reducing the possibility of cuts and scrapes in the event of a fall. Removable and washable FlipFold headliner provides adjustment to accommodate different head shapes. ASTM SEI certified.