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can kn95 masks be reused?

KN95 masks are made to trap and capture about 94.5 percent of the smallest particles that can measure up to 0.3 µm. Though viral particles are smaller than this, KN95 masks have layers that can trap that particle as they try to move in.

The use of the KN95 mask is safe for even 8 hours. Because the mask is long-lasting, and you are advised to use a face shield before wearing the mask. That will prevent the mask from getting oil stains from your face, thus lowering its life span.


Because coronaviruses lose their suitability significantly after 72 hours, many organizations have come up with a central system and reuse. Accepting no damage and not having any prevalent mask pollution, some manufacturers suggest that masks can be reused up to several times using the following technique:

Mask rotation

Get a set number of KN95 masks and rotate their use every day, allowing them to dry for an extended time so that the infection does not exceed 72 hours. Suitable storage for this strategy requires either breathing the equipment to dry it or keeping it in an ideal breathable holder such as a paper bag between uses. Ensure that the masks do not touch each other and that you do not share your ventilator with other individuals. The user’s stamp inspection should be performed before each use.

Crucially, when wanting to reuse KN95 masks, practice rapid disarming to keep away from contamination inside or outside the mask constantly. If the mask is heavily damaged or polluted by the method of evaporation production, it is advisable to get rid of it. However, if the mask is in acceptable condition, cleansing is best.

Cleansing methods

Below is a summary of the disinfection methods supported by the current data. Due to the quick idea of ​​this exploration, some distributions have not yet been examined. Also note that there are many postings of KN95 masks, with different binding materials and shapes. This way, one method may work admirably for one type of mask, not another.

Dry heat

The dry heating of the mask at 70 ° C for half an hour has been suggested as a decontamination method that can kill the infection and maintain the reliability of the duct for reuse. Late tests at the National Institutes of Health using viruses have expressly demonstrated that this two-cycle method can be used to kill an infection without compromising fitness.

UV treatment

Adequate UV treatment of KN95 masks requires explicit dosage protocols and adequately lighting the surface area to ensure proper disruption of viral particles with negligible mask damage. Because of the required accuracy, it is not recommended to use UV light at home. Some clinic systems have applied this decontamination method.

Damp heat

Moist heat has proven successful for influenza viruses, but there is limited data about the temperature, humidity, and time required to deactivate viral particles completely. Also, the parameters needed to kill the infection unfavorably may affect the adequacy of the mask.


As you have seen, KN95 masks can be reused and recycled. The only thing you should do is read all the reuse instructions well. If you cannot find the KN95 mask decontamination substances and tools, it is good to buy a new one.

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