The winery says:
Our 2018 Sonoma County Zinfinity is a beautifully balanced, densely structured, ageable wine. At its foundation is the fruit from 55-year-old vines in Biglieri Vineyard at the southern edge of Dry Creek Valley, blended with additional Old Vine Zin from the nearby Cartee Vineyard. To these finely nuanced Zins we added concentrated hillside fruit from Windsor Oaks Vineyard in the Chalk Hill sub-appellation of Russian River Valley, and Petite Sirah and Malbec from the steep hillside vines in the Doug Rafanelli Vineyard in Dry Creek Valley, to enhance the density and structure of the blend. The lots were aged separately for twenty months, then fashioned into Zinfinity and racked to French oak for additional aging. Winemaking was similar for all the lots in the blend: cold-extraction of gently crushed fruit, lengthy fermentation with vigorous pumpovers, extended maceration, French oak aging, quarterly racking—and minimal intervention. And, of course, there are copious (infinite!) rounds of blend trials to make the ultimate Zinfinity!
It's 80% Zinfandel, 15% Petite Sirah and 5% Malbec, and is incredibly rich and sumptuous at only 13.9% alcohol.
The other Knuttle Zinfandels from these top vineyards sell (and sell well) at $45, and this lush, rich and opulent beauty runs then VERY close.
This one has to be the best under-$20 Zinfandel in the market.