Mustilli works with the white and red varieties native to Campania, in Southern Italy's volcanic terrain. The winery's Greco Sannio, made from the ancient Greco grape, and Vigna Segreta, a Falanghina-based wine, represent the region's mineral-driven white tradition. Cesco di Nece, built on Aglianico, taps into Campania's darker, structured reds. These three wines have been assessed by Wine Enthusiast, Wine Advocate, Decanter, and Wine Spectator. Mustilli's portfolio reflects the distinctive character of its region: wines shaped by volcanic soils and indigenous grapes that define Southern Italian viticulture.