Hennessy XO Limited Edition by Julien Colombier CognacHennessy X. O (Extra Old) Cognac is a luxurious and high end expression from Hennessy, known for its rich complexity, deep flavors, and long aging process. The "X. O" designation means that the cognac is aged for at least 10 years, but many of the eaux de vie used in Hennessy X. O are often aged much longer, resulting in a sophisticated and highly refined spirit. Hennessy X. O has a complex and rich flavor profile with layers of dried fruit,