 These sherry butts from the house Gonzalez Byass are selected exclusively for The Dalmore.Spirits matured in ex-bourbon casks, Matusalem oloroso sherry butts, Madeira barrels, Marsala casks, Port pipes and Cabernet Sauvignon wine barriques are combined in perfect harmony to create a complex, yet smooth single malt.Matured initially in American white oak, the whisky is divided into rare hand-sourced 25 year old sweet Palomino Fino sherry butts and 1980 first fill bourbon casks.