Zacapa XO is a unique balance of complex aromas and flavors resulting from the exclusive blend of reserve rums. Hand selected rums are aged between 6 and 25 years in their unique “Sistema Solera”. Older and younger rums are then blended as they age in a sequence of barrels that previously stored robust American Whiskeys, delicate Sherries, fine Pedro Ximenez wines and finished in French oak casks which previously aged Cognac. Complex? Very.