PM2.5 filter offers a high degree of filtration from particulates and small air microbes. It can also filter any bacteria and viruses than a regular mask. This filter is also safe to use for people with respiratory problems.
This kind of filter can only be used for 2-3 days of continuous use.
No, it shouldn't be soaked with water so we suggest removing the filter first before washing your face mask.
The use of a sterilizer is a good way to kill all the bacteria from the filter after using it. If you don't have a sterilizer, we suggest keeping it inside a clean container for 5 hours.