PSI is a red wine from Ribera del Duero: a fresh red full of fruit from the Dominio de Pingus winery, created by the renowned agronomist and winemaker Peter Sisseck. It comes from old vines, on average more than 30 years old, grown in micro-plots by the small Dominio de Pingus winery. Maceration takes place in concrete vats to bring out as much fruit aroma as possible. Fermentation is entirely natural, with no added yeasts. Ageing takes place in concrete vats, oak vats and used French oak barriques from Pingus and Flor de Pingus. The oak never dominates; it simply helps refine the wine as it ages. PSI is neither filtered nor fined and is made through a meticulous, handcrafted process that results in a wine of exceptional quality. An exclusive wine that will not leave you indifferent. We recommend decanting it an hour before serving.