Sordo produces Nebbiolo-based Barolos from Piemonte's prestigious terroirs. The winery's top expressions—Riserva Barolo Rocche di Castiglione, Riserva Barolo Ceretta di Perno, and Perno Riserva Barolo—have been assessed by Wine Enthusiast, Wine Spectator, Wine Advocate, Decanter, and Falstaff. Barolo, the region's most structured red, demands time in bottle to reveal its characteristic tannins and complexity. Nebbiolo's high acidity and phenolic intensity define these wines, which age into layered, mineral-driven expressions. Sordo's Riserva designations indicate extended aging before release, a hallmark of traditional Barolo production in Piemonte.