To use these sunglasses, simply put them on your face like you would with any other pair. They're great for outdoor activities like walking, driving, or going to the beach. When not in use, keep them in a protective case to avoid scratches. Clean the lenses with a soft, lint - free cloth and mild lens cleaner. Avoid using harsh chemicals or abrasive materials as they can damage the frame and lenses. Also, don't leave them in direct sunlight or extreme heat for long periods as this may cause the plastic to warp.