|| These Smith Skyline gradient sunglasses protect your eyes from the sun and blend classic styling with a modern air. CR39 lenses provide 100% UVA/B/C protection and incorporate Smith Tapered Lens Technology(TM) to optimize viewing clarity. Tapered Lens Technology contours the thickness of the lens so that light travels through without distortion-what you see is what you get. Frames feature gray gradient lenses which are dark at the top and progressively lighter toward the bottom. Durable handmade acetate frames feature wire-core temples for easy adjustability and secure fit. 8 base-curve lens; (the higher the number the more curved the lens-Smith features sunglasses with 6, 7, 8 and 9 base curvature). Frames have a medium fit with medium coverage. Smith Skyline sunglasses include a protective case.