The sleek frames and comfortable nose pads are your best bet for a casual smart look. Structured with high quality material, these sunglasses are incredibly lightweight and durable. The nose pads give a better grip and fit for a comfortable feel. 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.