Maison Tessendier exclusively uses ugni blanc grapes harvested from the four best crus in France: Grande Champagne, Petite Champagne, Borderies, and Fins Bois. While other expressions in the brand's lineup feature eaux-de-vie from one to three growing regions, their Cognac Park XO Traditional Reserve uses eaux-de-vie from all four, each double-distilled in Charentais copper pot-stills. Aged for 20 to 25 years, new medium-toasted French Limousin oak casks were used during the first year of aging, followed by a secondary maturation in older casks. After blending, it is bottled at 40% ABV.