Jefferson's Reserve Bourbon is made from four different bourbons all with different ages, like the standard Jefferson's Very Small Batch Bourbon. This Very Old batch is meant to be more complex than the more approachable standard version. Batches for this bottling are made from 8-12 barrels as opposed to a few hundred like some brands. Bottled at a higher proof than the standard Jefferson's as well, 90.2 proof rather than 83 proof.