The Serengeti Polarized Aviators combine a classic aviator frame with Serengeti lenses for a cant miss combination. The lenses are made of glass for scratch resistance and clarity and the colors use Serengeti's spectral control technology to reduce haze and glare. The end result is that everything looks sharp and clear regardless of weather conditions. The frame is a classic metal aviator with spring hinges and adjustable nose pads.Polarized lenses control light to let your eyes relax and take in all the sights no mater what the conditions Unique spectral control filters for fine tuned vision~ stunning colors~ and completely relaxed eyes. Serengeti Spectral Control manages light~ creating beautifully enhanced vision. Glass lenses offer optimal optical clarity and scratch resistance. Lenses block 100%UV (ABC) Photochromic lenses (all colors) automatically lighten and darken depending on conditions for the ultimate viewing experience. The Amber colored drivers lens is particularly well suited to driving because it enhances colors and contrast~ and automatically lightens and darkens in response to changing light conditions The 555nm lens is ideal for brighter conditions. This unique lens tint manages yellow and green light for relaxed and comfortable eyes. The lenses automatically lighten and darken in response to conditions The light silver mirror coating is barely visible from the outside but further reduces eyestrain. Metal frame has a classic aviator style and is very comfortable for all day wear.