Product review (2 stars): Not a good filter
I have used these in humidifiers along with ones I buy from my local store. The ones from my store are Best Air Humidi-Wick filters. These ones with the black plastic outside are not good filters. The black outside quickly starts to weaken and makes the filter fall in on itself. They don't last a month and its almost impossible to rinse them off without it falling apart after a weeks worth of use. The ones from the store have a metal outside that does not weaken and keeps the filter standing up. These filters are the same price, so I would always try and find one with the metal outside so it will last.

These filters are better than the cheaper knockoffs you can find at filter stores and ebay. The ones I have bought from ebay will start falling apart the second they touch water and don't even think about rinsing them out. This is a real Holmes filter. I don't think Holmes makes very good filters unless this is also a cheap look alike in a Holmes box.