Foss Marai is part of the Consorzio dei Produttori Prosecco del Valdobbiadene but their claim to quality has been earned over generations. The Biasotto family has dedicated their efforts to the production of Prosecco for over a century. Foss Marai produces some very interesting wines and the Prosecco Extra – Dry is just one of many quality products. The vineyard is located deep in the valleys of Guia. The local dialect calls the valleys, fossi. Marai is another name for Guia, thus the winery took the name of the place of production, Foss Marai.