Viños Mar 7 is found in the heart of Sanlúcar de Barrameda and is run by María José Romero, whose family produces some of the best Manzanilla in the region. Indeed, María recalls her most memorable sherry moments have been over a glass of Manzanilla with her father, "a pharmacist by profession but a winemaker by devotion". Her biodynamic vineyard dates from 1820 and is in an enviable position with exceptional microclimatic conditions. María created Mar 7 in honour of her winemaking ancestors. The wines are quite unusually aged in old American oak barrels and see no additions during production.