Using these sunglasses is easy. Just put them on your face like you would with any other pair of glasses. They're great for outdoor activities such as driving, walking, or beach trips. When it comes to maintenance, use a microfiber cloth to clean the lenses gently. Avoid using abrasive materials as they can scratch the lenses. Store the sunglasses in the provided case when not in use to protect them from damage. Also, keep them away from extreme temperatures and humidity to maintain their quality.