Foam, cloth and liner. Metallic Quick release silent buckle. Outer material is made of ABS. Protects your head from sudden impact. ISI approved Helmet. New helmets may feel tight at first. This is normal and required to ensure safety. Foam requires around 10 days to adjust to rider's head shape. Visor: Scratch resistant & UV resistant. Visor in optical polycarbonate. Please go through the leaflet available along with the product.