Discover the ultimate partner for any outdoor adventure with Serengeti's Eyewear Bormio. Designed with an ultra-legendary and sporty look, these sunglasses are perfect for the modern man. The lenses are polarizing and photochromatic gray, transitioning from category 2 to category 3. The 555 nanometers mark the center of the visible spectrum of light, making it the perfect point for the human eye to see. Serengeti is a globally recognized brand known for its advanced technologies and refined aesthetic sense. With decades of experience, Serengeti is considered the most innovative and creative luxury eyewear brand in the world.