Product review (1 stars): The covering doesn't keep them standing. 9
Filters don't fit that well. It's a struggle to get them on the holders. The plastic covering is not stiff enough. The filter is supposed to stand by itself, but as soon as it gets wet it collapses. The only thing that keeps it up enough is closing the door. Don't know if it's possible to return the 3 unused as it comes 4 in a package. It is the right # for my humidifier, but they don't work the same as the original.