Château Cos Labory is a left-bank Bordeaux estate in Saint-Estèphe that makes Cabernet Sauvignon-dominant red blends.Château Cos Labory is now 18 hectares (44 acres), making it one of the smallest of the cru classé châteaux. It is planted mostly to Cabernet Sauvignon, along with some Merlot, Cabernet Franc and a small amount of Petit Verdot. The vineyard has a high gravel content along its border with Cos d'Estournel but has more clay along its other border, ideal for its Merlot.