The grapes used include the Arinto, Boal, Esgana Cão, Folgasão, Gouveio, Viosinho and Rabigato varieties. Mainly grown on the upper slopes of the Douro Valley, the individual wines are aged in oak vats for around three years, where they acquire mellowness and character. They are blended to produce a rich white port in the traditional sweet, full-bodied style.