To use these eye masks, first, find a quiet and comfortable place to rest or sleep. Scan the QR code on the package and start playing the relaxing sleep track. Then, open the mask and gently place it over your eyes. In a couple of minutes, you'll start to feel the gentle heat. The warmth will relax your tired eyes and help you fall into a restful sleep. Precautions: Don't let the self-heating mask touch liquids. Avoid using it while wearing contact lenses or right after using eye drops. Keep it away from babies, children, and pets. It's recommended for users aged 10 and above. Don't cut or tear the mask, and don't use it if it's damaged. Warnings: Use the mask as directed. Remove it if you feel any discomfort. If your eyes get irritated, rinse them with warm water. Don't use it if you can't sense heat. Avoid using it if you've recently had eye surgery. If you have a skin condition around your eyes or sensitive skin, get medical advice before using.