Product review (1 stars): Don't waste your money
These filters are more expensive than the AirCare MAF1 filters but only half as thick, so even if they worked they would only last half as long.  However, they are so thin they won't "stand up" when damp. They flop over and leave gaps between the filter and the fan assembly. They also tear very easily when damp.  Bought two. They first one lasted 3 weeks. I threw the second one away.  If I could give it a zero I would.