1800 is aged (rested) in primarily in French oak with a small amount of American oak for up to 3 years.It is made from 100% agave. This is the higher end version, the others being 1800 Silver and 1800 Reposado. A low end anejo which is redeemed by the price point. While it lacks the finish and complexity of higher end anejos, it also lacks the price. Simple, no frills and cheap compared to other anejos, but as much of a value as its other versions.