Duvel Single is a 6.8% ABV draught variant of Belgium's best-selling specialty ale Duvel 8.5% ABV. The Single Fermentation refers to the fact that it undergoes just one fermentation process. This gives it a gentle hoppiness, a mild aroma, and a subtle, fruity bite. Brewery Staff at Duvel Moortgat have enjoyed Duvel Single Fermentation 6.8% for decades and have traditionally cold filtered a small portion of this beer for sale, at a few select locations in Belgium, and more widely in the UK and USA.