Kriek Boon Mariage Parfait consists of 1 year-old heavy lambic flavoured with overripe cherries, 400 grams per litre. Longer aging in small oak barrels gives it its special flavour. The lambic is bottled and stored in an air-conditioned room for six months of secondary fermentation. Kriek Mariage Parfait has an alcohol volume of 8%. It keeps for a minimum 20 years, and is ready to drink after about 2 years in the bottle. This is perfection in kriek beers.