The non-woven fabric in Panasonic Water Purifier TK-CS20 provides exceptional filtration performance to remove coarse particles of dirt. At the same time, the activated carbon, which has an outstanding self-cleansing effect, absorbs harmful substances such as red rust & mold. These 2 features work together to provide clean water. Its cartridge life checker lets you know when it’s time to replace the cartridge, so you won’t forget to replace in order to always have clean, safe water.