Don't let convention constrict your sense of self. Ray-Ban® Anh Bio-Based RB3731 Sunglasses are for those who choose their own paths. These rimes Ray-Ban sunglasses have a unique and original lens shape. The bio-based nylon lenses connected to metal temples and bridges are made of at least 40% biological content from renewable sources. Get a comfortable fit with the adjustable nose pads and temple sleeves. Includes a protective case and cleaning cloth. Manufacturer style #: RB3731. Rimless sunglasses with original lens shape Bio-based nylon lenses made of at least 40% biological content from renewable sources Adjustable nose pads Metal bridge and temples Temple sleeves for comfort Includes protective case and cleaning cloth