VISION 8, 5, and 3 Lenses are constructed from the strongest and optically perfect, Polycarbonate material available. Anti-fog and hard coat is applied and all lenses provide 100% UVA protection. The VISION Lenses have a VLT between 25% and 90% depending on the chosen tint. The VLT is the “visible light transmission,” which is basically how much light the lens lets into the goggles.