Aberlour a'bunadh is a natural single cask strength malt whisky. Taken directly from specially selected sherry casks it is bottled without the use of modern filtering methods or the addition of water. This is a dark, heavily-sherried Aberlour a'bunadh, matured exclusively in Spanish casks that formerly were home to Oloroso sherry. This is probably one of the best-value cask strength whiskies available. 

While it carries no age statement, each bottle carries a unique batch number. It is released in limited-run batches ranging from one to as many as five per year, with the first batch released in 1997. The most recent release was batch No. 52, released in 2015. The whisky is a blend from barrels ranging from five to 25 years in age, and is bottled at cask strength, which historically has averaged between 59% ABV and 61% ABV. The whisky is not chill filtered, nor is any coloring added to it.