The microfilter removes grit, unlike other press-type coffee makers. These filters are designed for use with the AeroPress>, which allows you to make coffee anywhere. The AeroPress’ ideal water temperature and faster brewing yield richer flavor with lower acidity and no bitterness. Water and grounds are mixed together for 10 seconds, and then gentle air pressure pushes the mix through the micro-filter in just 20 seconds. Watch Evan’s guide on how to use the AeroPress here.