High West Double Rye Whiskey is made from a marriage of a feisty two-year old Rye Whiskey (composed of a mash of 95% Rye and 5% barley) that was fermented with High West's proprietary strain of yeast, together with a saddle-smooth 16 year-old Rye Whiskey (composed of a mash of 53% rye and 37% corn).