Serengeti Sunglasses Rivoli 7916 Shiny Matte Black Mineral Polarized 555nm Green Photochromic Black They feature a keyhole bridge Brown Gradient They feature a keyhole bridge and thin temple tips for a comfortable fit Carrera Glasses Frames 213 003 Matte Black Men have a plastic frame with a rectangular shape and are designed for men Serengeti Sunglasses Rivoli 7916 Shiny Matte Black Mineral Polarized 555nm Green Photochromic are from the Serengeti Flex series and they will adjust to the shape of your head for a supremely comfortable snug fit The lenses are of course Serengeti's unparalleled photochromic lenses which will lighten darken for optical light transmission in any condition and also reduce eye strain and fatigue