Sinatra Century is composed of a blend of classic Jack Daniel's Old No. 7 and specially aged whiskey matured for a minimum of 4-5 years in special "Sinatra" barrels - denoted by deeply grooved staves that open the whiskey to extra hues of toasted oak. Produced in a mere 100 barrels, and bottled at 100-proof, this 100-year anniversary is a must-have limited edition for fans of Jack and Sinatra alike.