The 100% Islay 15th Edition was distilled from Kilchoman's 2014 and 2015 barley harvests before being matured for a minimum of 9 years in 54 ex-bourbon barrels. The time spent maturing in ex-bourbon barrels has added layers of caramel, vanilla, and butterscotch which balance beautifully with the natural citrus sweetness and peat smoke of the Kilchoman spirit.