Patiently aged oak in a selection of darkly coloured Oloroso Sherry oak casks, most of which have been used for a single season of Sherry making, the perfect treatment for infusing The Macallan with deepness of colour and magnificent complexity of intense flavour. As the aging casks reach the peak of maturity, the lots of Whisky are gently reduced to 46.5% alcohol with natural spring water drawn from bespoke wells, hidden deep beneath the Macallan estate cellars at Craigellachie near the confluence of Rivers Fiddich and Spey.