Porsche Design P8478 Sunglasses combine an ultra-light titanium frame with the brand's signature interchangeable lens system for versatile, high-performance sunwear. Key attributes: Gray | Indeterminate | Titanium | Interchangeable lens system | Lightweight construction | Impact-resistant polycarbonate lenses | Scratch-resistant coating | Quick-lock interchangeable lens mechanism | Teardrop aviator lens shape | Thin titanium frame | Iconic P'8478 silhouette | Dimensions & fit: Lens width: 69 mm | Bridge: 10 mm | Temple length: 135 mm | Composition & care: Titanium (frame) | Coated polycarbonate (lenses) | Wipe with a microfibre cloth only.