The Oakley Straightback owes its sharp looks to its streamlined corners. With the O-Matter frame, this Oakley Straightback is a very strong, flexible and light pair of glasses. The nose piece is made of Unobtainium, which keeps these sunglasses in place during perspiration and high speeds. The Icons (the Oakley logo on the side of the glasses) can be changed to the color of your choice. This allows you to personalize the Oakley Straightback even more than just colors!