The n95 mask is not a disposable mask. In this particular case (shortage of resources), it can be reused.
But there are conditions:
1. When n95 is contaminated with saliva, blood, tears and other body fluids, it must be replaced
2. The user obviously feels that the respiratory resistance is greater than before and must be replaced
3. Mask is damaged and must be replaced
4. It is recommended to replace after 4 times.
However, masks cannot be reused if people go to the hospital, come into contact with an infected person, or are suspected of being infected.
5-layer filter function:
1. The first layer: Spunbond cloth, filter micron-level dust
2. The second layer: filter industrial pollutants, car exhaust, second-hand firework powder allergy
3. The third layer: the function of activated carbon cloth, benzene and smaller dust filter
4. The fourth layer: the filter has a high density and a smaller material
5. Fifth layer: Spunbond cloth, filtering out various harmful substances;
