To use these sunglasses, simply put them on your face and adjust them for a comfortable fit. When you're not wearing them, keep them in the provided case to protect them from scratches. Clean the lenses with a soft, dry cloth regularly to keep them clear. Avoid exposing them to extreme heat or cold, as this can damage the frames and lenses. With proper care, these sunglasses will last you a long time and keep you looking stylish.