1.When wearing the facemask, the nose beam should be on the top. The CSD logo is on the upper left corner of the user and the white color layer is the inner layer.
2. Take out the mask and put it on directly. Pull the wrinkles from top to bottom and cover the nose and chin completely.
3.The two sides of the plastic nose beam needs to be pressed down onto the bridge of the nose.
4. Finally, adjusting the elastic band to match the whole face.