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 you're not using them, store them in the provided case to protect them from scratches. To clean the lenses, use a soft cloth and a bit of lens cleaner. Avoid using rough materials or harsh chemicals as they can damage the frame and lenses. With proper care, these sunglasses will stay in great shape for a long time.