3 Fonteinen Oude Geuze is a blend of one-, two- and at least three-year old lambics. Spontaneously fermented. Matured in oak barrels. Extended bottle ageing. Unfiltered. Unpasteurised.

For this particular blend of Oude Geuze, 3 Fonteinen blended lambics originating from six different barrels and ten different brews, brewed by three different brewers.

They put a large part of lambics of at least 24 months old (44%) and of at least 36 months old (36%). This way, the weighted average age of this blend upon bottling is more than 29 months.

Of the lambics brewed by 3 Fonteinen, more than half of the cereals used was sourced from their own Cereal Collective in and around Pajottenland.