The Oakley OO9521-0657 Tourniquet sunglasses feature a matte carbon frame and Prizm Tungsten lenses, designed for those who seek both style and performance. The lightweight O Matter frame ensures durability and all-day comfort, while the Prizm Lens Technology enhances color and contrast for a superior visual experience. The square frame shape provides a modern look, and the Unobtainium earsocks and nose pads increase grip with perspiration, ensuring a secure fit during high-intensity activities. These sunglasses offer 100% UV protection, making them ideal for both sports and everyday wear.