Product review (1 stars): COLLAPSES/USELESS in MA0800!
This product was totally defective in my MoistAir humidifier model ma0800. I put the filter in my humidifier, filled up the tank and ALL 4 filters collapsed within 2 days, and COULD NOT humidify at all. I am so frustrated with this purchase! BAD PRODUCT! I can't return for a REFUND because the filters turned to MUSH when wet! Total waste of money!