Michael Kors Montreux MK4123U 3005 is a square acetate frame designed for everyday prescription wear. Its classic profile and prescription-ready construction make it a versatile choice for daily use. Key attributes: Black | Acetate | Prescription-ready frame | Lightweight construction | Demo lenses for easy replacement with prescription lenses | Includes original Michael Kors case | Square frame | Dimensions & fit: Lens width: 57 mm | Lens height: 47 mm | Bridge width: 17 mm | Arm length: 145 mm | Composition & care: Acetate | Clean lenses with a microfiber cloth. Wipe frame with a damp cloth and mild soap. Store in the supplied case.