Serengeti Sunglasses Alray 8943 Shiny Dark Gunmetal Black Mineral Polarized 555nm Green are a classic clubmaster style but with the excellent photochromic lenses that are Serengeti’s forte. The acetate and metal frame has a pattern engraved in the bridge and metal inserts on the side of the frame. The Ultra-light mineral glass lenses feature the superb spectral control and photochromic technology that sets Serengeti apart.