This unique production technique results in an 'Icewine' which is aged in French Oak casks - these casks are the ones used to create the Glenfiddich Winter Storm. Brian discovered that only the rarer, 21-year-old whiskies could cope with the intensity of the Icewine barrels, hence why this Experimental series has such a high age statement.
This is the third release in the Experimental Series (following Project XX and the IPA Cask). It's also reportedly the smallest production in the series to date with just short of 8,000 bottles globally.