Using these sunglasses is easy. Just put them on your face and adjust the temples for a comfortable fit. When you're not wearing them, keep them in the included case to protect them from scratches and damage. To clean the lenses, use a soft, dry cloth. Avoid using harsh chemicals or abrasive materials as they can scratch the lenses. Also, don't leave them in direct sunlight or a hot car for a long time as this can damage the frame and lenses. With proper care, these sunglasses will last you a long time.