By law, all grapes in the region must be harvested by hand. The wine is made using carbonic maceration, whole berry anaerobic fermentation which emphasizes fruit flavors without extracting bitter tannins from the grape skins. Grapes are loaded and sealed into a large (on the order of ) sealed container that is filled with carbon dioxide. Grapes that are gently crushed at the bottom of the container by the weight of the grapes start to ferment, emitting more CO2. All this carbon dioxide causes fermentation to take place inside the uncrushed grapes (without access to oxygen, hence "anaerobic fermentation"). The resulting wine is fresh, fruity, and very low in tannins.