Product review (4 stars): WAAAAAY cheaper than pre-cut filters and works just as well!
I was paying 2-3 times as much for pre-cut filters for my cool mist humidifier. I bought these to try and will continue to buy them. I am able to get about 4 filters from one of these filter "sheets". Cutting them is easy but messy since the black layer of the filter flakes off and goes everywhere. Get the vacuum ready. The filters I cut seem to work the same as the more expensive pre-cut filters so no complaints there.