A progressive take on a retro-inspiration Burny features distinctive style with performance and comfort Kaenon Polarized is known for. A fashion statement for men and women equally this durable performance-wrapped TR-90 frame houses 8-base SR-91 lenses for razor sharp optical clarity and unsurpassed glare reduction. Featurning throw-back temple design highlighted by discrete branding and logo detailing. Burny comes with a protective metal case and is Rx-adaptable of course. The C12 lens is the darkest grey lens. It blocks 88 percent of visible light. It performs best in bright full sun conditions.