Olivier Horiot 'Solera' Champagne Brut Nature NV

Biodynamic.  Pinot Noir, Pinot Meunier, Chardonnay, Pinot Gris, Pinot Blanc, Arbane, Petit Meslier. Each variety is vinified separately in oak barrels on the lees for about a year and go through malolactic fermentation. The base wine is pulled from a solera reserve which is then replenished with the wine from the new vintage. The amount of time sur lattes varies and is cited on the wine's back label.  While usually released as a Brut Nature, the wine can also come as Extra Brut depending on the bottling.