Product review (5 stars): Filters for the baby's humidifier.  So excited!
Yeah, they're filters all right.  I think they appear to be of good quality and the one I have used was easy to install in teh machine.  It has little metal bands inside that serve the dual purpose of poking you in the hands and fingers while providing structural support to the filter.  After a while they get really nasty and moldy and disgusting, which appears to be due to the fact that the filter sits in water all the time more than as a result of the removal of anything in teh water itself.

I am hoping that these nicer filters last a little bit longer than teh last ones that I bought in a store.  We will see.  I don't have much to say on this one except that they are exactly what the description indicates and if you like humidifier filters. . . you are in for a treat.