The importer says:
The Terre de Sables is a blend of Pinot Noir, Chardonnay and Pinot Meunier. As referenced in its name, the cuvée is made from grapes grown on the domain’s sandiest soils and is sharply marked by it, with notes of marine minerals being supported by bright acidity. This cuvee is a blend of vintages, with 50% of reserve wine. It is held “sur lattes” for four years before disgorgement and finished with a dosage of 4g/L.