Retro charm meets modern innovation with the Ray-Ban RB4421D Bio-Based sunglasses. The rectangular full-rim frames, crafted from a blend of nylon and propionate, feature a sleek low bridge fit for all-day comfort. Molded acetate temples provide a polished finish, while the bold brown frame is perfectly paired with classic yellow lenses for a fresh pop of color. Designed with a distinctly authentic edge, these Ray-Ban sunglasses are a timeless statement of effortless style, offering a unique option for those seeking brown sunglasses.