Aged for a minimum of 7 years, the whisky is a blend of two incredibly rare selections from Eifel's stock. Half of the blend has a principal aging of 3 years in refill red Bordeaux casks made from American oak followed by 4 years of aging in 1st fill freshly emptiedfull size Laphroaif 10 yr old Whisky casks (which previously held Maker's Mark). The other half of the whisky has aged between 4-5 in 1st fill freshly emptied full size Laphroaig 10 yr old Whisky casks and then finished for 2 years in first fill red Bordeaux casks from Chateau Ausone- one of only four wines in Saint-Emilionto hold the top classification of "Premier Grand Cru Classe(A)"