Wheat beer is a beer, usually top-fermented, which is brewed with a large proportion of wheat relative to the amount of malted barley. The two main varieties are Weißbier, based on the German tradition, and Witbier, based on the Belgian tradition; minor types include Lambic (made with wild yeasts and bacteria), Berliner Weisse (a cloudy, sour beer), and Gose (a German-type sour, salty, herbal beer).