The Estates Tier highlights wines sourced from a collection of vineyards in select appellations within Napa Valley deemed by Robert Mondavi's winemakers to be among the very best. The grapes for the Carneros Chardonnay were grown on the foggy, wind-swept slopes of the region. The cool nights, foggy mornings, and afternoon breezes that blow in from San Pablo Bay allow for the slow, even ripening needed for the development of key flavours and aromas.