To use these sunglasses, simply put them on your face. They're suitable for various outdoor activities like walking, driving, or beach trips. When not in use, store them in a hard - case to prevent scratches. Clean the lenses with a soft, microfiber cloth and a bit of mild lens cleaner. Avoid exposing them to extreme heat or cold as it may damage the plastic frame. Also, don't bend the frames forcefully as it can cause them to break.