Made from a proprietary blend of red grapes grown in Northern Italy and particularly suited for sparkling wine production. The grapes are harvested separately as they ripen at slightly different times. After being destalked and pressed, a part of the must is filtered and stored at a low temperature to prevent alcoholic fermentation, while the remainder is allowed to complete fermentation. The wines then undergo natural second fermentation in closed tanks in order to produce sparkling wines. A blend is then made up of the various wines left to develop and mature separately.