Product review (4 stars): These humidifier filters mean no worries about dirty air.
These filters work great in my humidifier. They also last a long time and I would recommend changing your filters frequently so you don't get mold or dust clogging your humidifier.  My air definitely feels cleaner.  When I ordered them they came quickly and were easy to install. I keep an extra set on hand now so I can conveniently change them when needed.