Product review (5 stars): Use your filter
Humidifiers are a great help in winter and provide the necessary relief to combat the factors that lead to dry skin, static electric shocks, nose bleeds and feeling uncomfortable.  Finding the correct humidifier is important, when you do, finding the correct working filter is even more important.  These filters are long lasting, easy to install and productive.  You can get a month's worth of effective filtration and relief.  This filter is specifically made by Holmes and is worth the slightly higher price as it last longer and resists mildew build up. Good product.