Performance and classic style: oakley tourniquet sunglasses oo9521 the oakley tourniquet oo9521 sunglasses offer a classic square design with oakley's performance technology. This model combines a matte black opaque nylon frame with prizm mirror lenses, resulting in a sporty yet stylish accessory, ideal for everyday wear and light activities. Its design is intended to offer a comfortable and secure fit, standing out for its durability and the improved visual clarity provided by prizm lens technology. Product technical details saddle shape: square frame material: nylon finish: matte glass material: polycarbonate glass type: mirror dimensions caliber (lens width): 57 mm bridge: 17 mm rod (auction): 140 mm lens height: 40.0 mm o009521 wear them for a clean, performance-focused look, perfect for driving, cruising, or simply soaking up the sun. The nylon frame ensures a lightweight feel, while the prizm black mirror lenses not only offer striking style but also provide superior sun protection and optimized visual contrast. Mix classic square style with oakley innovation and prizm lenses in the tourniquet model!