Typically Bourbons are produced w/ 3 kinds of grain (Corn, Rye & Barley) or (Corn Wheat & Barley). We chose to use all 4. Corn, Rye, Red Winter Wheat & Barley. When put into oak wheat adds sweetness/mouthfeel & rye adds additional spiciness. Using 4 Grains we have created a very full flavored, balanced Bourbon w/ great rye spice.