Marenco operates in Strevi Passito, a specialized corner of Piemonte devoted to sweet wine production. The winery draws on the region's signature varieties: Muscat Blanc à Petits Grains, Barbera, and Brachetto. Its flagship Passri Scrapona, made from Muscat Blanc à Petits Grains, represents the aromatic intensity and honeyed complexity that defines the passito style. Alongside this sits Bassina Barbera d'Asti, which channels the structure and dark fruit character of Barbera in a drier expression. A Brachetto d'Acqui rounds the portfolio—a lightly sparkling red that captures the delicate floral and berry notes typical of the variety. Wine Enthusiast, Wine Spectator, and Wine Advocate have all assessed the winery's output. The wines reflect Piemonte's capacity for both opulent sweet wines and food-friendly reds, anchored in indigenous grapes and traditional regional methods.