Balenciaga Nano Square AF Sunglasses combine a crisp square frame with high-coverage lenses, designed for everyday sun protection and easy optical conversion. Key attributes: Black | Acetate | 100% UVA/UVB protection (UV400) | Lens category 3 | Adjusted fit | Suitable for prescription/optical conversion | Square shape | Full-rim frame | Nano BB logo metal plate on both temples | Dimensions & fit: Lens width: 56 mm | Bridge width: 18 mm | Temple length: 145 mm | Adjusted fit | Composition & care: Acetate frame | Bio-nylon lenses | Wipe lenses with a soft, non-abrasive cloth. Store in the protective case when not in use. Avoid contact with chemicals and prolonged exposure to high heat.