Limited-production Patrón Cask Collection Sherry Cask Aged Añejo is a remarkably distinctive tequila that has matured for more than two years in oak barrels from Spain that were previously used to produce the finest Oloroso Sherry. The barrels do their part, but each is different, so it takes the artisanal talent and skill of our master distiller to artfully blend from those casks to achieve the perfect expression of this spirit.