The sleek detailing and comfortable nose pads add a combination of aesthetics and functionality to these sunglasses. For a lightweight anti slip and skin friendly nature, they are built with high quality metal. The UV protected lens further make them ideal for your eyes. Titanium is a high-tech metallic element that is lightweight, strong, and has Non-corrosive and hypo allergenic properties. It is Bio-Compatiple. Titanium has a highest strength to density ratio of any metallic element. Titanium Frames are strong and durable with twice the tensile strength of Monel.