Kaenon: Glass wasn’t strong enough. Polycarbonate wasn’t clear enough. Neither material allowed for adequate customization of tints and Light Transmission Levels. So we set out to develop our own, revolutionary new polarized lens material. At the core of every Kaenon Polarized sunglass is our patented SR-91 – the most advanced polarized lens on the market. SR-91 is the only polarized lens that offers distortion-free, razor-sharp clarity, impact-protection, superior scratch-resistance and glare-reduction all in one ultra-lightweight lens. California designed and crafted in Italy, Kaenon Polarized frames seamlessly blend fashion and functionality into pure luxury performance.