The grapes come from the Yerri Valley in the Tierra Estella region, which benefits from a continental climate significantly influenced by the Atlantic due to its proximity to the Bay of Biscay; the winters are cold, and the summers are hot. The vineyard is located at an altitude of 600 metres and is influenced by strong winds, which help to keep the canopies ventilated and the vines healthy. Unlike other areas of the D.O., the Tandem vineyards experience cool summer nights, allowing the grapes to ripen gradually and impart natural, refreshing acidity to the fruit, resulting in elegant and fresh wines. This gradual ripening also means the harvest occurs three or four weeks later than the Navarra D.O.’s southern region. The soils are made of clay loam, which offers good water retention properties. The average rainfall is 600 mm per year, sufficient to nourish the vines naturally; the vines are dry-farmed, ensuring the best expression of terroir. The vineyard is cultivated sustainably; only organic and natural products are used.