Nolan N91 Solid Adult Street Motorcycle Helmet - Flat Black / Large Quick-release and multi-position anti-scratch shield accepts Pinlock antifog insert. Adjustable chin and top vents plus air flow rear extraction. Removable and washable Clima Comfort interior lining and cheekpads with antibacterial treatment. Dual action chinbar release for safety Microlock2 (patent pending) double lever retention system