Using these Fender sunglasses is easy. Just put them on when you go outdoors, and they'll not only protect your eyes from the sun but also make you look stylish. When you're not using them, keep them in a protective case to avoid scratches. Clean the lenses with a soft, clean cloth. Don't use harsh chemicals as they can damage the frame and lenses. Also, avoid leaving them in hot places like a closed car, as high temperatures can warp the frame.