VISION 8, 5, and 3 Lenses are constructed from the strongest and optically perfect, Polycarbonate material available. Anti-fog and hard coat is applied to each lens and all lenses prove 100% UVA protection. The VISION Mirror Lenses have a VLT (visible light transmission) ranging from25% and 38% depending on the chosen tint and mirror color. The VLT is basically how much light the lens lets into the goggles. Look amazing with exceptional optics and stylish Vision Mirror Lens at the track or on the trail.