Boss 1791/G/S Sunglasses blend a bold squared-butterfly silhouette with gradient dark lenses for reliable sun protection. The acetate frame and signature logo detail make them a versatile everyday accessory, compatible with prescription lenses. Key attributes: Black | Dark grey | Acetate | UV 400 protection | Filter category 3 (high sun protection) | Gradient lenses | CE certified | Prescription-compatible (RX-able) | Squared / butterfly frame shape | Gloss finish | Double B logo detail on temples | Dimensions & fit: Lens width: 52 mm | Bridge: 21 mm | Temple length: 145 mm | Frame width: 143 mm | Lens height: 46 mm | Medium fit | Size M | Composition & care: Clean lenses with a soft microfibre cloth. Avoid harsh chemicals and abrasives. Store in the protective case when not in use.