Ray-Ban Warren RB4396 sunglasses are a classic take on the timeless rectangle frame. The acetate frame is transparent dark blue, with dark brown lenses. These sunglasses use bio-based acetate containing 67% bio-based carbon content. The Ray-Ban RB4396 Warren sunglasses feature a squared acetate frame in a decisive blue color with brown lenses, offering a modern look. They are recommended for round and oval faces to add definition and structure. Ideal for both men and women.