Single Lens Features: Lexanr anti-fog and anti scratch UV-A, UV-B, UV-C 100% radiation protection Tear Off Features: 904675 - Standard kit:Ø 5 stacks, 6 tear offs per stack 904676 - Laminated kit recommended for racing:Ø 3 stacks, 7 tear offs per stack.Ø This is a clearly superior laminated tear off system that works like traditional products, only faster and easier! Mount 7 layers at one time and stack up to 21 tearoffs with undistorted optical clarity. Highest quality available, advanced patented technology by Racing Opticsr USA. Important:Ø Install with \"Racing Opticsr\"" label facing out. Fold each tab individually with hole centered over post."