Calumet Farm Single Rack Black 15 Year Old Bourbon Whiskey is the pinnacle of the Calumet Farm Bourbon family. It represents the premium quality our brand is known for, as well as the hard-earned badge of patience. Allowing our bourbon to age slowly in Kentucky-only rick houses is a testament to doing things the right way - the way bourbon should be done. All barrels used to craft these rare batches are aged in a single, center cut rack. This expression of the Calumet Farm Bourbon family is our most aged and highest proof to date. It is Non-Chill Filtered for added depth of character and color.