Product review (5 stars): Filters are cheaper at Menards, but good product none the less.
Hope they never stop making these filters.  I have had the humidifier with the green water tank (shown on the box), for about 20 years and have no desire to get a different one, as the humidifiers of today seem to range from poor quality to awful.

I have issues with sleeping in dry air, and these fine American made filters help me a great deal.  They seem to go a long time without getting stinky, and do a great job of keeping the dust out of the mist!