Smokin’ Riff is composed of several types of casks, including North British Virgin Oak and Pedro Ximénez Puncheons from Craigellachie and Knockdhu. The cask breakdown specifically mentions North British Virgin Oak (28%), Craigellachie Pedro Ximénez Puncheon (24%), Knockdhu Pedro Ximénez Puncheon (21%), Caol Ila Bourbon Barrel (18%), and Caol Ila Red Wine Barrel (9%).