Porsche Design Sunglasses P8931 A Black Green Silver Mirror Polarized Porsche Design knows that great design isnt just about looksits about function, too. The P’8931 sunglasses are the perfect example, combining sleek style with smart engineering for a pair of shades that feel as good as they look. At the core is the Air Spring Flex Zonean advanced take on the spring hinge. It flexes to reduce pressure at the sides of your head, giving you a comfortable fit all day long. Whether you’re on the move or relaxing, these sunglasses stay perfectly in place without pinching or sliding. Built from 100% titanium, the frame is incredibly light but super strong. The RXP temple tips add flexibility and cut down on weight, so they feel almost weightless. A bold, three-dimensional bridge adds a premium touch, while the modern aviator-style lenses give off a clean, exclusive vibe.