Product review (5 stars): Good replacement for original filter
So far it seems like a great replacement for the original filter in my HCM-305 humidifier. These seem like they put out the same amount of moisture over time as the original even though they are a bit shorter. They came flattened for shipping so I had to "reshape" them a bit. There a lot of replacement filters out there of this style however these ones seem to be quality and I will buy them again as long as the quality is consistent. I will update this if I find something wrong down the line. Only con is the price for these, I don't see why these filters need to be as expensive as they are but all the replacements are roughly the same price.