The world's most beloved Islay malt, even called the "king of Islay malts." Quarter cask was inspired by the 19th century barrels that were commonly used to transport horses. By aging in a barrel that is smaller than a barrel, the contact surface between the barrel and the unblended liquor increases and matures faster.The unblended liquor matured in traditional bourbon barrels is dismantled and made into a quarter. It is aged in a cask and bottled with an antille filter.