At the core of this Darkness expression is an 8 year old single malt Scotch whisky which has been matured in ex-bourbon barrels. Following that, the whisky is moved over to custom-made Oloroso sherry octave casks for at least three months. Small casks make for a vastly increased surface area to volume ratio compared to the much larger sherry butts, leading to more cask influence and more of those intense sherried notes we`ve all come to know and love.