Product review (5 stars): love it
Great filter. I have had my humidifier that this fits for almost 10 years now and it is still going strong.  I like these filters, because the black mesh surround helps to give the filter support and it also has antibacterial properties.  It is lightweight and seems to be well constructed.  I change these filters usually twice a winter.  An important thing to note is that you can NOT leave them in your humidifier with water in it and not run the humidifier.  They will be moldy.  I use Holmes Bacteriostat in the water to help keep bacteria from growing on the filter.  I would recommend this brand to use with your Holmes Humidifier.