Putting on the KN95 mask.
Before putting the mask on, you should wash your hands properly (warm water + soap) and check that the mask is not defective
The rigid part, generally made of a small metal bar, should be placed around the nose.
One strip goes behind the head and the other one behind the neck.
Once the mask is in place and attached, pinch the small rigid part around the nose with your index finger and thumb. This should bend around the bridge of the nose and allow the mask to fit the face as closely as possible.
Adjust your mask and make sure the top of the mask covers the nose completely.
The lower part of the mask should cover the whole chin. In the case of surgical masks, this adjustment under the chin should be achieved by stretching the mask out; just extend the three folds.