Saint Laurent SL 557 Shade Sunglasses combine a slim rectangular silhouette with acetate construction and UV‑protective nylon lenses for everyday wear and prescription conversion. Key attributes: Black | Acetate | UVA/UVB protection | Prescription lens compatible | Full-rim frame | Engraved logo on temples | Includes case and cleaning cloth | Slim rectangular silhouette | Curved edges | Slim arms | Dimensions & fit: Lens width: 53 mm | Bridge width: 20 mm | Temple length: 145 mm | One size | Narrow fit | Composition & care: Acetate | Nylon | Wipe lenses with a microfiber cloth; store in the supplied case; avoid abrasive cleaners and solvents.