Product review (1 stars): Misrepresented product; Buy Direct from Vornado instead
As others have said, this in NOT a filter made by vornado.  Not only is it not as thick as the vornado filters, but it is also too small for the filter space, leaving space at the top which defeats the airflow of the humidifier.  I rarely had to fill my humidifier while using these, because they keep the unit from working correctly.

I have made this mistake before, thinking I was getting a name brand filter instead of a third party knock-off, and so am usually very cautious about which filters I purchase.  This seller did a very good job of misrepresenting the product as original.

If you are tired of Amazon sellers playing bait and switch, go directly to Vornado's website.  There you can order filters for the SAME price as these knock-offs, and have them delivered to you for free, quicker than "super saver" shipping.