A classic style with endless features will leave you wanting more of the Milano. SerengetiÕs signature high-definition, photochromic Ultra-Light lenses encased with premium nylon Frame technology offers flexibility and a customized fit for wherever the road may take you. With the most optically superior lens on the market, you will see the world in the brightest color. What are you waiting for? Liven up your world. All Serengeti lenses offer the latest in photochromic technology, which constantly lightens and darkens throughout the day to ensure you see every detail.