Karl Lagerfeld Square Sunglasses offer a squared acetate frame with medium-tint CR39 lenses for reliable UV protection and everyday wear. Key attributes: Multicolor | Black | Acetate | UV protection | CR39 lenses | Category 2 tint (medium sunlight) | Can be fitted with prescription lenses | Standard hinges | Square frame shape | Full-rim silhouette | Monobridge | Dimensions & fit: Lens width 54 mm | Bridge width 18 mm | Temple length 140 mm | Frame width 131 mm | Medium fit (54 mm lens width) | Recommended for oval and round faces | Composition & care: Acetate (frame) | CR39 (lenses) | Wipe lenses with a microfiber cloth; avoid abrasive cleaners and solvents; store in a protective case.