Product review (1 stars): Health hazard!  Definitely not antimicrobial, black mold grew in mine
I have had the same basic Kenmore console humidifier for eight years, and this was the first non-OEM filter replacement I've bought.  It does not humidify as well - the console has to run much longer to humidify - and it is much thinner.

It is also definitely not anti-microbial, or at least not as much as the OEM wick is - the air coming out of my console started to smell bad, like cat pee, and when I opened the unit the thing was covered in black mold!  The unit had only been in operation for three weeks before this happened, and I clean mine weekly with vinegar and monthly with bleach.