Using these Fender sunglasses is easy. Just put them on when you go outdoors to enjoy the sun. When you're not using them, keep them in the provided case to prevent scratches. To clean the lenses, use a soft, lint - free cloth and a little lens cleaner. Avoid using rough materials or harsh chemicals, as they can damage the lenses and the frame. Also, don't bend the frames too much, as this may cause them to break.