Unlike Bourbon or Rye, which, by definition, must be aged in new oak barrels, Michters US1 Unblended American Whiskey is aged in a way that utilizes whiskey-soaked barrels to achieve a rich and unique flavor profile. In late 2013, then Master Distiller Willie Pratt agreed to re-release our US1 Unblended American Whiskey after a nearly three-year absence from the market, deeming it just right and the best its ever been. Crucially, thier US1 Unblended American Whiskey never contains grain neutral spirits hence its unblended distinction.