 | Ray-Ban Warren Bio-based Sunglasses Transparent Dark Blue Frame Brown Lenses 57-20. Ray-Ban Warren Bio-Based RB4396 sunglasses are a classic take on the timeless rectangle frame. The acetate frame is transparent dark blue, with dark brown lenses. TheseSunglasses use bio-based acetate having 67% bio-based carbon content.... - Ray-Ban Warren Bio-based Sunglasses Transparent Dark Blue Frame Brown Lenses 57-20. |