Calumet Farm Single Rack Black 15 Year Old Bourbon Whiskey is the pinnacle of the Calumet Farm Bourbon family. Allowing this 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 the most aged and highest proof to date. It is Non-Chill Filtered for added depth of character and color.