Kahna Crosse 1 sunglasses are a classic wrap style made from highly durable TR90 Nylon, Providing outstanding strength and flexibility while remaining extremely lightweight. Our polycarbonate lenses provided by Carl Zeiss Vision offer 99.9% UVA/UVB protection and high impact resistance for durability and longevity. The patented snap feature on all Kahna Crosse 1 temples provide a high quality feel and allow our frames to stay secure in any activity. Finally, our generously sized patented cushioned ear pieces bearing the Kahna name assure consistent fit and comfort.