Product review (1 stars): PAPER PRODUCT WILL NOT HOLD HUMIDIFER WATER
I though this I had received the wrong product or this was a joke.  This is NOT a humidifier filter.  IT IS MADE OF PAPER.  It is had large openings and I can not imagine how the water is to remain in place on the paper.  It would seem that once this paper product becomes wet, it will lose its shape and become a ball of wet paper.  The other serious issue is when I open the box and tried to shake the "filter" out, it fell out in pieces.  The glue that holds the sections together had dried and a strange paper creation that looked like some kindergarten project fell out of the box.  I Returned the mess immediately.  Not recommended.  Hope that helps.