90% Nerello Mascalese/10% other local varieties. "Arenaria" is named for its contrada and was Acosta's first wine from outside Mt. Etna' volcanic terroir. It comes from a half-hectare parcel of 70-plus-year-old vines in Castiglione, just outside of Etna, on Mt. Portella at 700 meters. The north-facing vineyard is a mixed planting of various indigenous white and red varieties. The farming is organic. Nerello Mascalese is the main red, with Nerello Cappuccio, Alicante and Garnacha; the whites include Minnella, Catarratto, Grecanico and Inzolia. The terre bianche soils are sedimentary, from sandstone and marl (arenaria in Italian) with clay and quartz.

The bunches are hand-harvested, vinified as a mix of whole clusters and destemmed berries, co-fermented spontaneously with native yeasts and without sulfur or temperature control in concrete tank. Maceration lasts around 15 days. The wine is aged for 18 months in concrete with minimal racking. It is bottled without fining or filtration and with a tiny amount of sulfur.