Gentleman Jack's smooth character is a result of Mr. Jack's dedication to the old-time charcoal-mellowing method. Unlike any whiskey in the world, Gentleman Jack is charcoal-mellowed twice - once before it's aged in those charred white oak barrels, and once again four years later before it's bottled. It receives what the whiskey tasters here in the Jack Daniel's Hollow call "a double blessing" from the charcoal mellowing process.