From 80-year old un-grafted vines.
From importer, Vom Boden:
There’s simply no way Ulli Stein can be making any kind of money off the Blue Slate Riesling—he’s such an advocate for what the Mosel can do that he seems willing to take a financial hit just to get these delicious bottles into people’s hands. That must be the only possible explanation for how a wine this serious, this terroir-driven, from un-grafted vines that are 80-years-old and planted on steep slopes that demand back-breaking work, can be so inexpensive. This light, salty, wildly refreshing and bracing Riesling is an insane value, and is a textbook example of dry, mineral-driven, Mosel.
Statistics: 81 Oechsle, 6 grams residual sugar, 8.6 acidity, 11% alcohol