Raffaele is the most vintage shape of Serengeti Collection. Combining a pantos round shape with a trendy key hole and embellished with delicate metal inserts, this feminine design gives its wearer a deceptively retro look within lurks an unconventional character. Acetate. Expertly produced and cured from all-natural cotton, our Cellulose Propionate Acetate is not only handcrafted to be lightweight but can be made into beautiful patterns and brilliant hues. Pliable when heated, it is ideal for custom fitting. Ultra-Light Mineral Lens. A full 20% thinner and lighter, Serengeti s Borosilicate mineral glass lenses are finer than any other lens. Produced in the same process normally reserved for ophthalmic-quality corrective lenses, they also provide the best visual optics in the industry. Each photochromic lens passes through a Hydrogen-fuelled Lehr furnace, which fuses each lens with the Spectral Control technology - with varying temperatures that determine the proprietary lens hue. A high-contrast rose-colored lens with a silver mirror, the Sedona lens reduces glare from flat light and provides superior image definition. Very bright light conditions. Ideal for Boating and Mountain activities. Spectral Control Technology. Serengeti Spectral Control technology fine-tunes the light waves passing through the lens, for a highly reduced blue light transmission, naturally enhanced detail and colors that pop, crisp and clear. Polarization Technology. Whether you re in a high- or low-glare environment, you deserve lenses that give you the ultimate glare protection and with it, uncompromising clarity. Serengeti s Polarizing technology suppresses glare and sets your eyes free, releasing them to enjoy all the depth and beauty the world has to offer. Photochromic Technology. Whether crossing sun-scorched desert valleys or winding mountain roads, Serengeti lenses perfectly adapt to changing light conditions.