Product review (1 stars): Possibly dry rotted, fell apart into 14 different pieces when lifted out of the box.
I ordered these to fit my Idylis 4 gallon humidifier as recommended . These are poor quality. I don't know if they became dry rotted or something, but they actually felt crunchy and fell apart when I tried to take them out of the box. Each of the 4 filters should be in one piece, I have 14 different pieces because they fell apart. Terrible. I tried to piece them together to get the humidifier working because it's very dry in our house, but as you can imagine it's not going well.