To use these Fender sunglasses, simply put them on like you would any other pair of glasses. When you're not using them, store them in a protective case to prevent scratches. Avoid exposing the sunglasses to extreme heat or cold as it may damage the frame or lenses. Clean the lenses with a soft, lint - free cloth. If the lenses get dirty, you can use a mild lens cleaner. Also, don't bend the frames too much to keep the shape intact.