Mumm Napa Brut PrestigeThe Brut Prestige grapes are harvested by hand during the crisp morning hours to ensure they arrive at the winery in pristine condition. Fermentation is conducted at cool temperatures, mainly in stainless steel tanks to preserve freshness and fruit intensity. A few selected lots are aged in French oak barrels to add depth, complexity and spiciness to the final blend. After initial fermentation, the art of the blending begins. Our winemakers find the