This Oakley Square Wire consists of a frame made of a C-5 alloy, which makes the glasses very light. Furthermore, the ear socks are made of "Hydrophilic Unobtainum", which ensures a good fit and a lot of comfort for the user. Furthermore, the Plutonite lenses of these glasses are 100% UV-filtering and shatterproof, and the lenses are available in the Polarized and Prizm form. All in all: the Oakley Square Wire is a true classic.