1. Hold the mask by the left and right ears in both hands and hang the rope.
2. There are different shades of color inside and outside the mask (dark outside, light inside). The dark face is facing outwards, and the light face is facing you.
3. Hang the rope around the ear of the mask in both hands, respectively.
4. Put the metal strip close to the bridge of your nose and pull down the end of the mask to cover your chin so that no wrinkles appear.
5. Start with the bridge of the nose and press the mask from the middle to both sides, so as to make the mask stick better to the nose and mouth and play a real protective role.
