Silhouette TMA Icon 8691 is a Rimless frame for Men and Women, which is made of Titanium.Titanium is one of the lightest and most durable materials. Its superior tensile strength and corrosion resistance make it a smart investment. It is hypoallergenic, so it comfortable as well. This model features a Rectangular shape, with a Single Bridge.These Sunglasses work well for people whose style is: Classic, Stylish Designer.Ideal for usage with: Fashion, Everyday Driving.Silhouette TMA Icon 8691 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.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.