This Dalmore 21 Years Old was first matured in American white oak. At around ten years of age it grew tired of the same cask and wanted a life of more adventure. Enter first-fill Matusalem Oloroso Sherry butts, quite literally, from the Gonzalez Byass Bodega in Spain. After a decade of maturation in these sherry butts, she was refined to creating an exceptional finish full of character. This is the 2015 release that comes in a beautifil slide-out box.