Flexon Nathaniel 600 Sunglasses pair Flexon's memory-metal engineering with a rectangular full-rim silhouette for lightweight, shape-retaining everyday wear. Key attributes: Gray | Slate | Flexon | Shape-retaining memory metal | Lightweight metal frame | Durable construction | Silicone nose pads | Regular hinge | Progressive lens compatible | Rectangle shape | Full rim | Dimensions & fit: Lens width: 54 mm | Bridge width: 17 mm | Temple length: 140 mm | Medium fit | Composition & care: Flexon (titanium-nickel alloy) | Silicone (nose pads) | Wipe frames and lenses with a soft, lint-free cloth; store in the supplied case when not in use.