Ron Zacapa XO is a luxurious dark rum, crafted using a blend of rums aged between 10 and 25 years. It is produced using the "Sistema Solera" aging process, which involves aging in barrels that previously held American whiskey, sherry, and Pedro Ximénez wines, and finished in French oak casks that previously aged Cognac. This results in a smooth and complex rum with rich flavors.