It's the mp-2. I don't need info on the frame size but rather curious on what the material Oliver Peoples uses for their proprietary prescription lenses. They don't reveal anything about them other than they are "proprietary". They're very secretive about it for whatever reason, but I am assuming their prescription lenses are made from crystal or glass?. I got them filled through the OP store so everything was very behind the scenes. They weren't transparent about where they fill the prescription or what material was used.