This Cuvee is made up of Chardonnay grapes exclusively from six Grand Cru sites in Le Mesnil sur Oger, Oiry, Oger, Avize, Chouilly and Cramant. Champagne Duval-Leroy was one of the first Champagne houses to be HVE3 certified and a multitude of sustainable practices are employed. Measures are taken to combat the run-off of rainwater, to limit the pollution of both underground and superficial water; grass cover crops are grown and processes to combat soil erosion are employed. Biodiversity is positively encouraged, sustainable fertilizers are used and sexual confusion of predators takes place instead of insecticides. The plots and weather conditions encountered are carefully monitored, with soil testing and cartographic, computerized methods in place for full traceability of products used in the plots. Above all, preventative measures are in place to minimize the use of products, which if necessary, are carefully chosen to have the least impact on the environment.