Ray-Ban RB3721 sunglasses are a modern square shape that is perfect for those looking for a style that will set them apart from the crowd. The gunmetal frame with gradient brown lenses adds an extra touch of sophistication to these square shades, making them ideal for all day wear. These unisex sunglasses combine both comfort and style, ensuring they look great in any situation - whether you're out and about or simply looking to make a statement with their classic brown on gunmetal frame.