Shell Painted HIR-TH (high resistant thermoplastic) resin Number of shells: 2 shell sizes Ventilation System: Front & top vents made from wide holes in the shell protected by metallic grids & side extractors interior Fabrics: Dry-Comfortwith hygienic treatment Removable & washable (excluding neckroll) Visor Clear & anti-scratch polycarbonate City 11 visor Double Rail XQRS (Extra Quick Release System): shield & peak replacement without tools in few seconds Retention System: Micro-metric adjustment buckle