Product review (5 stars): exactly what it needs to be
this filter is just what my humidifier needed, I have a Vicks Cool Mist Humidifier. Came quick. Fits perfect. Air is clean. I have been using it for a few months (I don't use it every night, but like 3 nights a week) and I can already see how the filter is changing color, so to me, that means its working. So I will make sure to get a new one by next season.