Zero Dosage Le Domaine d'Henri is Michel Laroche's homage to his father, Henri. 8.21 is méthode ancestrale / pétillant naturel sparkling wine made from 35+ year old vines in the Chablis appellation. Fermentation starts in stainless steel vats and finishes in bottle, with 24 month on the lees in the bottle.The wine is then disgorged, with no added sugar (i.e., zero dosage). "821" refers to the minimum total number of days necessary to produce this wine from the beginning of the growing season to the moment the bottle leaves the cellar.