Using these Otra Eyewear Ila Gold sunglasses is easy. Just put them on like you would any other pair of sunglasses. They are great for wearing outdoors on sunny days to protect your eyes from the sun. When not in use, keep them in the soft cream vegan case that comes with them to prevent scratches. To clean the lenses, use a soft, lint - free cloth. Avoid using harsh chemicals or rough materials on the frame or lenses. If you drop the sunglasses, check them for any damage before using them again. Store them in a cool, dry place to keep them in good condition.