The Serengeti Silio features a titanium frame finished in matte black, and a blue lens. The lightweight titanium frame is both comfortable and durable, meaning you can wear these sunglasses all day long. The Blue lens of the Silio is not only stylish but also provides 100% UV protection, making it perfect for any outdoor activity. Serengeti is passionate about providing the best possible vision for their customers, and the Silio sunglasses are no exception. With state-of-the-art lens technology, the Silio ensures crystal clear vision whilst protecting your eyes from the sun’s harmful rays.