Product review (4 stars): Fits Humidifer and wicks well, just wish it was more durable.
Holds up for a season (Winter) if cleaned gently.

I need to clean mine every couple of weeks due to mineral build up.  The filer/wick gets weakening from that cleaning and will need to be replaced after a while.  Originally these were much more costly, thank goodness prices have come down a little.  It would be great if they made a fabric one that would stand up better to cleaning.