Using these sunglasses is easy. Just put them on your face like you would with any regular pair of sunglasses. They're great for outdoor activities such as driving, beach outings, or hiking. When it comes to maintenance, use a soft cloth to clean the lenses. Avoid using rough materials that might scratch the polycarbonate surface. Also, when not in use, keep them in the provided case to prevent damage. Remember, these sunglasses offer UV400 protection, so they're a reliable choice for protecting your eyes under the sun.