Product review (5 stars): Works perfectly, and less expensive than the official Sears replacement filter
I've been using this replacement filter for years, and it's not only less expensive than the official Sears replacement filter, but it does the exact same thing.  Seriously, you replace this humidifier filter every couple of months during the winter -- why pay so much more? A sink rinsing of the filter every time I wash out the bottom of the humidifier keeps it longer as well. Great deal!