Nolan Visor Duetto Adult N21 Street Motorcycle Helmet - Flat Black/White / Large Lexan polycarbonate shell. Two shell sizes accommodate sizes 2XS through 2XL. Scratch-resistant treatment on both sides of VPS (Vision Protection Shield) plus UV400 Nolan Microlock retention system. Fully adjustable chin strap is integrated into inner padding for smooth fit. Helmet lock ring Frontal air intakes on select models. Removable, washable, antibacterial inner padding with attached neck roll for noise reduction Approximately 950g. Ncom ready (Multi). D.O.T. (in US) ECE 22.05 (EU)