The Ray-Ban RB3721 is a contemporary metal sunglasses model that brings a clean and sophisticated square silhouette to modern eyewear. The full metal frame features sharp geometric lines, adjustable nose pads, and a comfortable standard fit. Available in elegant combinations such as Black on Black, Black on Gold, Black on Silver, and Brown on Gunmetal, the RB3721 offers versatile styling with solid and gradient lens options. Designed with Ray-Ban’s signature craftsmanship, this model is ideal for those looking for a stylish everyday frame with a premium metal finish and timeless appeal.