Montblanc MB0457O Optical Frame pairs a sturdy acetate full-rim construction with a clean profile for reliable everyday prescription use. Designed for practical wear, it ships ready with demo lenses and the original case. Key attributes: Black | Nero | Acetate | Full rim construction | Includes demo lenses | Includes case and accessories | Dimensions & fit: Lens width: 54 mm | Bridge width: 19 mm | Temple length: 145 mm | Composition & care: Acetate | Wipe lenses and frame with a soft microfibre cloth; avoid abrasive cleaners and prolonged exposure to heat or direct sunlight.