Ray-Ban RB3683 gold frame with clear gradient brown lenses 。Ray-Ban RB3647N Round Double Bridge model. They feature a polished gold metal frame and brown gradient lenses, with a pink mirror finish, a popular color variation for this style. Key Features Style: The frame is a modern take on a vintage style, combining round lenses with a distinctive thin metal double bridge. Frame: It has a full metal, gold-tone frame with adjustable silicone nose pads for comfort and fit. Lenses: The lenses are glass, non-polarized, offer 100% UV protection, and feature a gradient tint with a category 3 sun protection factor, suitable for high brightness. Authenticity Details: The model number (RB3647N) and size information (typically 51-22-145mm) are inscribed on the inside of the left temple arm. These sunglasses are a best-selling unisex model known for making a bold style statement.