Product review (5 stars): Excellent and cost less.
These are great.  They are double the thickness of the Vornado wicks and cost less.  I use them for my Vornado Evap3 humidifier.  I had been using Vornado wicks but the don't always stand upright.  Further, they last at most 2 to 3 weeks.  The FilterBuy wicks have lasted a month each, with daily vinegar soaking.  I enthusiastically recommend the FilterBuy wicks.