Very rarely will you find a pair of reliable sunglasses that you can really trust to bring with you while traveling the world. Enter SunGod: the take anywhere, do anything, not-to-worry sunglasses with a lifetime warranty to back it up. Durable, flexible frames mean you can bend and twist them without snapping the arms and all lenses are impact and scratch resistant, with triple-layer scratch resistant coating. They even offer a polarized option for all lenses and styles.
Note: The lifetime warranty covers the frames and any defects with the lenses, however you can pick up replacement lenses from their site for around $25.