Using these Fender sunglasses is easy. Just put them on your face and adjust the temples for a comfortable fit. When you're not using them, store them in a hard - case to prevent scratches. To clean the lenses, use a microfiber cloth and a bit of lens cleaner. Avoid using harsh chemicals or rough materials as they can damage the lenses and the frame. Also, don't leave them in a hot car as extreme heat can warp the frame or damage the lenses.