Nike 4307 N Sunglasses pair a flexible Flexon memory-metal frame with a rectangular silhouette, designed for everyday wear and easy prescription lens fitting. Key attributes: Black | Satin Navy | Flexon | Memory metal frame for flexibility | Lightweight construction | Adjustable core-wire temples | Rubber temple tips for improved grip | Full-rim frame compatible with prescription lenses | Rectangle frame shape | Ultra-thin temples | Flat metal accent on upper rim | Dimensions & fit: Lens width: 56 mm | Bridge width: 18 mm | Temple length: 145 mm | Composition & care: Flexon (memory metal frame) | Rubber temple tips