Glenglassaugh Evolution is created by maturing the whisky in a unique combination of the finest hand-picked ex-Tennessee first-fill whiskey barrels. This expression shows great depth of character and finesse, a harmonious combination of whisky and oak. Bottled at 50%, natural colour and non chill filtered, Evolution represents the heart of Glenglassaugh's distinctive personality, and indeed the landscape in which it is set.