Product review (5 stars): Fits Vorando humidifier; larger mesh
These replacement filters are used on a double-reservoir Vornado humidifier.  Minimum fan speed setting.  Maximum humidity setting.  New York City one bedroom apt, used in the living room.  Dry air.  Please pass the hand lotion.  (Ugh.)  After a few days of usage (without letting the humidifier accidentally go dry), these filters seem to be doing the job fine.

Some things to note.  Upon receiving the item, I compared these replacement filters with a previous set of Vornado filters.  The dimensions are the same.  Same LxWxThickness.  Two things that caught my eye.  (1) Between each filter is a stiff metal mesh layer.  Imagine a white bread sandwhich with a thin smear of silver in the middle.  That's what each of these things look like.  At first, I couldn't figure out what these internal meshworks would be for, but after I soaked each one in the shower, it became evident.  The wet filters are flimsier than the originals, and without the wire mesh, the wet filters would fold and flop everywhere.  The mesh seems to give it some backbone.  (2) The mesh weave is looser than the Vornado filters.  Like comparing the grids on graph paper with a chain-linked fence.  Well, not that extreme, but noticeable.  The Vornado filter is thinner stripped and more tightly woven.  These replacement filters are broader stripped and more openly woven.

Performance-wise, given the conditions listed above, I don't notice any problems.  In fact, it would seem that these replacement filters are holding up.  The base water is able to wick up and stay up to the very top of the filters.  The top outside edge of the filters are a little dry and cracky, but most of the filter remains moist and white.  This is different from my experience with the Vornado tight-weave filters, which would often dry well out at the tops of each filter.  The living room doesn't seem to suffer from any problems associated with dry air.  We are not getting static shocked in our own apartment, so that's good.  Lastly, there are no overt odors associated with these filters.

Overall, we are happy with the price, shipping, and function of these filters.