Don Julio Ultima Reserva is an extra añejo tequila, meaning that it was aged extensively in oak barrels that used to hold bourbon. Afterwards, it was finished in casks that have been seasoned with Madeira wine. This results in an exquisite spirit that was aged for 36 months in total with toasted oak, caramel, and fruit notes with the agave still shining through beautifully. Ultima Reserva is bottled at 80 proof.