Shell Fibreglass ACF (Advanced Composite Fibre) Number of shells: 1 shell size Ventilation System: Front air intakes & rear extractors Fabrics: Dry-Comfortwith hygienic treatment Inside padding: removable & washable Visor Clear & anti-scratch polycarbonate Street 1 visor Shield Mechanism: XQRS (Extra Quick Release System): shield replacement without tools in few seconds Retention System: Micro-metric adjustment buckle