Persol RATTI Sunglasses. There is a surely an meeting point between the latest technology and impeccable styling. Between exclusive materials and expertly crafted finishes. Between functionality and style. That meeting point in the Persol RATTI Research Center where scrupulous attention to details is combined with CAD-CAM computerized system. And where designs are transformed into unique creation. Every Persol RATTI sunglasses model is a perfect miniature MASTERPIECE. All metal frames are 18 Karat gold plated with an underlying multilayered structure in nickel-palladium therefore guaranteeing a beautiful shine as well as protection against corrosion. The hinges of the most important models marked with the traditional arrows, combine extreme functionality with impeccable elegance. The top quality lenses guarantee freedom from optical and chromatic anomalies, while the characteristic yellow-brown color provides the wearer with realistic color reproduction which are both pleasant and shooting to the eyes.