Product review (4 stars): This is a good filter
This filter does a great job with my older Holmes humidifier.  A bit expensive here on Amazon's website, as I found it at Holmes' website for a lower price even paying for shipping.  I normally love buying through Amazon, but I didn't want to buy 3 filters just to get the free shipping.  I normally get through a northeast winter using 2-3 of these filters and it really helps minimize the static electric shocks from the carpet and sofa.  I just wish there was a way to wash these filters so I could save some money. :-)