100 proof, product of Czech Republic This is a refined slivovitz. The aroma is similar to many other brandies and to cognac. The color, aroma and the taste are all affected by being aged in oak. The taste of the plums from which it is made is still present, but not as prominent as in the 5-year old product. It is smoother than its 5-year old sibling, of course. Both are 100-proof, and quite potent. Worth a try, if you are a slivovitz devotee as I am.