Serengeti Carrara is a Full Rim frame for Men, which is made of Metal.Most metal frames are made out of Monel. Monel has a copper and nickel base. This metal can be corrosion resistant, strong, and easily adjusted. It retains its stability and shape. This model features an Aviator shape, with a Double Bridge.These Sunglasses work well for people whose style is: Classic, Stylish Designer.Ideal for usage with: Fashion, Driving, Everyday Driving.Serengeti Carrara Sunglasses come with a cleaning cloth and protective carrying case.These sunglasses are available with a mirror coating option on certain colors. Mirror coatings are suitable for protection from intense light. A mirror coating reflects back light and reduces the amount of light passing through the lens. This makes it more comfortable for eyes in very sunny conditions.These sunglasses are available with polarized lenses on certain colors. Polarized lenses have a filter within the lens that blocks the wavelengths of light that cause glare. They can greatly enhance contrast and allow for greater depth of vision, especially in water. They are ideal for any situation where glare reduction is necessary, like driving or playing sports.The sunglasses are available on certain colors with gradient tinted lenses - Gradient tints are tints that start off at a darker color at the top of a lens and then gradually lighten towards the bottom of the lenses. These tints are great for fashion and for reading outside on sunny days. Gradient coatings work by allowing an appropriate amount of light to filter through in certain areas and less in places where protection is most necessary.These sunglasses are available with photochromic lenses on certain colors, which are light sensitive and adjust to varying light conditions. The color goes from dark in sunny conditions to clear in cloudy or indoors conditions.