Parparoussis works with the distinctive grapes of Peloponnesos, Greece's southern peninsula. The winery's portfolio centers on fortified and naturally sweet wines—expressions rooted in the region's classical tradition. The Muscat de Rio Patras Vin Naturellement Doux Moschato Rio, made from Muscat Blanc, and the Mavrodaphne of Patras Reserve Vin Doux Naturel, crafted from Mavrodaphne, represent the house's focus on these aromatic, honeyed styles. Both have drawn attention from Wine Spectator, Decanter, Wine Advocate, Falstaff, and Wine Enthusiast. The winery also produces a dry expression: the Nemea Réserve, built on Agiorgitiko, the dark-skinned grape native to the Nemea region. These wines reflect Peloponnesos's terroir—a landscape of varied microclimates and ancient viticultural heritage.