Serengeti Chloe is a Full Rim frame for Women, which is made of Nylon.Nylon is a thermoplastic material that is blended in order to counteract its initial brittleness. Nylon blends are lightweight, stable, and resistant to breakage. Nylon has less of a tendency to "bleed" it's plasticizers resulting in great hypoallergenic properties. It can be blended with polyamides,grilamid, or trogamid. This model features a Rounded Edges shape, with a Single Bridge.The Serengeti Chloe Sunglasses feature the following logo: Serengeti "S" logo on lens and templeThis 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: Everyday Driving.These sunglasses can accommodate prescription lenses. Please call our Customer Service Department to order prescription lenses for this model.Serengeti Chloe 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.