Mason Cellars is a family owned and operated winery founded in the Napa Valley in 1993. We pride ourselves on producing only the finest wines that are true to their varietal character. Our sauvignon blanc is grown from vineyards in Yountville, California, a region well suited for producing elegant sauvignon blanc because of its cool evening maritime influence and warm days. Created by dedicated hands, we hope you will enjoy our Mason sauvignon blanc. - Randy & Megan Mason. www.masoncellars.com. Alcohol 13% by volume. Produced and bottled by Mason Cellars Oakville, CA.