Product review (1 stars): " It's nice that they have a wire mesh insert that keeps ...
As another buyer commented, these do NOT wick the water past about 2 inches up; consequently the humidifier cannot deliver the moisture into the air. They also grew mold on them, which never happened with the generic paper filters - so much for being "anti-microbial."  It's nice that they have a wire mesh insert that keeps the shape, but in the end, I can't recommend this product at all since it doesn't perform its main function: to humidify the air.