Product review (5 stars): More absorbent than OEM Vornado filter
UPDATE:  November 4, 2012 - just received another set of these filters - again, not a genuine Vornado filter which is fine with me - it's also the BestAir-brand I have received for the past 2 or 3 winters and they are fine. Also, I notice NO stinky sweat odor like another reviewer complained about. I have no idea what's up with that!
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These filters are not genuine Vornado filters, the box says RPS Products/BestAir, but these filters seem to be spongier and more absorbent than the genuine Vornado filters I purchased a couple years ago.  I used this BestAir-brand filter last winter also and one set lasted 3 months before it lost it's wicking ability. It's a perfect fit (you get 2 filters in a box, one for each side of the humidifier).