Porsche Design P8478 Sunglasses combine an ultra-light titanium frame with the model's signature interchangeable-lens system for adaptable sun protection and a classic aviator profile. Key attributes: Titanium | Blue gradient | Titanium | Extremely lightweight frame | Scratch-resistant polycarbonate lenses | Impact-resistant lenses | Interchangeable lens system | Quick-lock lens replacement | Teardrop aviator shape | Base-6 curved lenses | Dimensions & fit: Lens width 69 mm | Bridge 10 mm | Temple 135 mm | Composition & care: Titanium (frame) | Polycarbonate (lenses)