Product review (1 stars): THEY STOP WICKING AFTER 2 WEEKS!!
Not sure why, but I am guessing something to do with the materials used or the coating.  But these filters stop wicking after 2 weeks.  I tried several with the same results every time.  Normally my filters last at least  solid month or longer and even then they still wick.  These completely dry out and the humidity level plummets.  Not worth it.