Ray-Ban RB4439D Squared Sunglasses combine a geometric silhouette with a beveled top bar for a modern, statement-ready look. Designed for everyday wear, they pair a lightweight propionate frame with resilient polycarbonate lenses. Key attributes: Gray | Transparent Grey | Grey | Propionate | Polycarbonate lenses | Polarized option available | Suitable for driving | Prescription-ready | Compatible with graduated lenses | Squared/rectangular front | Beveled/diagonal-cut top bar | Round metal rivet detailing | Full-rim construction | Flat-style lenses | Dimensions & fit: Lens width: 54 mm | Bridge width: 21 mm | Temple length: 145 mm | Lens height: 40 mm | Effective lens diameter (ED): 58 mm | Composition & care: Propionate | Polycarbonate | Clean lenses with a microfiber cloth; avoid abrasive cleaners and solvents. Store in protective case when not in use. Do not expose to extreme heat.