Product review (4 stars): Seems Perfect for Intended Purpose
This item seems perfect for its intended purpose.  We hadn't used our humidifier for a number of years due to mild winters, so when I took it out this year as the next mini-ice age starts, I found the old filter was in very bad shape.  I ordered this one and it arrived right on time and is of very high quality.  The biggest downside is that the price is very high, but it seems to be the only reasonable option.