Ray-Ban Round Metal RB3447 delivers a retro round silhouette in a slim metal frame. The classic design pairs adjustable nose pads and thin temples for comfortable, everyday sun protection. Key attributes: Black | Negro | Metal | UV protection | Non-polarized lenses | Category 3 sun protection | Adjustable nose pads | Plastic temple tips | Round frame | Full-rim | Thin metal temples | Curved brow bar | Dimensions & fit: 47-21-140 mm (lens-bridge-temple) | 50-21-145 mm (lens-bridge-temple) | 53-21-145 mm (lens-bridge-temple) | Available in lens sizes 47 mm, 50 mm and 53 mm | Temple lengths 140 mm or 145 mm depending on size | Composition & care: Metal | Clean lenses with a microfiber cloth and store in the protective case when not in use.