Jack Daniel's single barrel goes through the same treatment that the famous NO.7 does but it with a bit of a difference. For instance it has a Higher ABV of 45%, it is 100% proof & is stored in a different location. Every drop is still filtered through 10ft of sugar maple charcoal ensuring its distinctive flavour & making it not a bourbon. It also has the same ingredients as the NO.7 including rye, grains of corn, barley & pure iron free water. It is still placed in the same barrels & interacts with them in the same way. When it is hot the oak barrels open up their pours to let the whiskey sink in & when it is cold they contract to get the whiskey out. This is what gives the whiskey its colour & oaky charred flavour. Where they place the barrel in the barrel-house is what makes the difference between the whiskeys. Barrels with the potential to be single barrel are placed in the highest point of the barrel-house called the Angels roost. Here the summer temperatures can reach well over 100 degree Fahrenheit & in the winter they can easily drop below freezing levels. These extreme conditions can cause the whiskey to move in & out of the barrel dramatically, resulting in the intense maturation needed to develop the unique flavour of Jack Daniel's Single Barrel.