How often do kn95 masks change?

How often do kn95 masks change?

Kn95 mask can be used for 3 days in general, but doctors recommend changing it every 4 hours, and changing it every 1-2 hours in crowded places.

If the kn95 mask is contaminated, for example, in a crowded place, if you sneeze or cough on the opposite side, it is contaminated and needs to be replaced in time.

The medical kn95 mask can be used for 3 days, but under the current situation, it is recommended to replace it every 4 hours, depending on the surrounding environment. If you are wandering in the community, you can wear kn95 mask many times and change it once a day. However, if you go out to a crowded place, it is recommended to change it every 4-6 hours, 2 masks a day.