Indistructible Bi Focal Clear Lens Rider Glasses with Clam shell case Virtually INDESTRUCTIBLE Frame...Glasses come with a protective hard shell clam case & a protective cleaning cloth / pouch. Clear Lens with Bi-focal section strengths for 1.5 to 2.5 Virtually INDESTRUCTABLE Frame.   Foam padded.   Clear Lens with Bi-focal section strengths for 1.5 to 2.5   Great for glancing down to see & read speedo / sat nav   Full UV400 Protection   Great wrap round design   Shatterproof Polycarbonate Lenses   Lenses contain UV400 filters for maximum protection from harmful UV & UVB Rays.   Made for the American Market, they also exceed the US ANSI Z87.1 standard for safety glasses. Indistructible Bi Focal Clear Lens Rider Glasses with Clam shell case