Product review (2 stars): Not as advertised
This filter was supposed to be like a "HEPA" filter for a cool mist humidifier. Despite sanitizing my entire humidifier before using this filter, the filter molded over with fuzzy green and black mold within 6 weeks. The regular filter that came with my humidifier was made to last 8 weeks, and it never molded.
This is not as advertised.
However, I do like the metal mesh instead of a plastic mesh, because it's easier for me to recycle, now that I've had to throw out the filter.
I will not buy this again.