Product review (5 stars): Quickly absorbs water in my Honeywell HCM-350. Just as good as the originals
I love these filters, they are very absorbent and with my Honeywell HCM-350 a gallon of water empties in 8 hours. My house went from dry and scratchy to moist overnight. I highly recommend these filters to anyone needing a replacement filter that actually works.

Edit: After 5-6 months, they are starting to decrease their rate of water evaporation. From a gallon in 8 hours (originally) to a gallon in 36 hours. Two of these with Honeywell HCM-350's are still keeping my apartment fairly moist.