Unfiltered beer is beer that has not been filtered, meaning nothing has been removed from it. Filtering beer removes sediments, mostly particles of yeast and protein, from the final product. Unfiltered beers are more flavorful because of the presence of yeast, hops, and barley, and they have a grainy texture and hints of many flavors. Unfiltered beers used to be thought of as dirty or unfinished, but they are now gaining popularity due to their complex flavor and aroma. Some examples of unfiltered beers include Kellerbier, Zwickel Lager, Witbiers, Berliner Weisses, and hazy IPAs.