Rivoli 01RIVOLI 01 It is part of the acetate series of the 003 collection: Flneur inspired by those who observe the world as if it were a work of art. It's constructed with a premium Italian acetate frame and equipped with hinges that adjust to the shape of your face. (Each pair may look different due to the nature of the acetate sheet.) It features brown polarized lenses with UV 400 Category 3 protection. (Complies with international standard ISO 12312 1.)