MB is presumably: 80% corn, 8% rye, and 12% malted barley. Aged 6-7 years. Barrel char: toasted barrels. (Brown Forman). Here the company used "a long, slow toasting prior to charring. A further tweak was using a much lower than usual entry proof (100, lower than even the distilleries that claim low entry proof as a selling point!) and putting those specially made barrels on the top floor of a warehouse...Lower entry proof simply means more water in the barrel with the whiskey, so it will absorb more of that wood sugar and break down volatile chemicals in the spirit faster. Finally, the top floor of the warehouse is where the building’s internal climate is hottest, so the contents of the barrel expand more in summer, pushing deeper into said toasted wood" (Whiskyreviewer.com: http://whiskeyreviewer.com/2018/11/jack-daniels-single-barrel-heritage-tennessee-whiskey-review/). Full of vanilla and brown sugar on the nose. Flavor is sweet and surprisingly spicy with some licorice and another unidentifiable, though good, flavor. Additional water seems to hurt this whiskey. Interesting enough to be happy that I tried it but at this price there is just better stuff out there.