Montblanc MB0422O Optical Frame pairs the brand's Snowcap design with a sturdy acetate construction. Its square-rectangular silhouette is designed for everyday prescription wear and polished, professional looks. Key attributes: Black | Nero | Acetate | Durable acetate construction | Full-rim support for lenses | Compatible with prescription lenses | Includes demo lenses | Supplied with original case and accessories | Rectangular frame | Full rim | Snowcap emblem on temples | Wire core with Extreme 3.0 pattern | No front rivets | Dimensions & fit: 51-21-150 mm | 53-21-150 mm | Medium fit | Composition & care: Acetate | Clean lenses with a microfiber cloth; avoid solvents and abrasive cleaners; store in the supplied case when not in use.