Jack Daniel’s Triple Mash is a blend of Bonded American Malt, Rye and Tennessee Whiskeys at 100 proof. It delivers notes of honey, malt and soft oak leading to a long lasting well rounded finish. The Bottled-In-Bond Act (1897) stipulates that the whiskey must be: from a single distillery, from one distilling season, bottled at 100 proof, and aged in a federally bonded warehouse for at least four years (seasons to mature).