The name Fio is Portuguese for thread. The estate that makes this wine is a joint venture between the well-known Portuguese producer Dirk Niepoort, his two sons, and the Kettern family of Weingut Lothar Kettern in the Mosel. In the cellar, these wines are fermented naturally and without sulfur in old Mosel foeder barrels. The resulting wine is energetic and zippy with hints of quinine and lemon pith. It offers a light, refreshing, and almost saline tartness like that of a gose. Fio is producing avant-garde wines without pretense for everyday drinking.