Serengeti Martino is a Full Rim frame for Men and Women, which is made of Plastic. This model features a Rectangular shape, with a Single Bridge.The Serengeti Martino Sunglasses feature the following logo: Serengeti name on temple and "S" logo on lensThis frame features a spring hinge, which keeps its initial balance and adjustment, thereby avoiding the need for subsequent adjustments.These Sunglasses work well for people whose style is: Classic, Cool/Trendy.Ideal for usage with: Fashion, Everyday Driving.Serengeti Martino Sunglasses come with a cleaning cloth and protective carrying case.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.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.