"When the brewery was founded in 1946 to brew and commercialize the beers of the Trappist Monks of Westvleteren, the brewery received 4 recipes from them: Abt 12, Prior 8, Pater 6 and Extra 4.
In the 70's this 'Enkel' or 'Single' style got out of fashion and the production of the Extra 4 was discontinued.
In origin, the Extra 4 was brewed by the Monks for their own consumption, but this beer is seldom sold in Belgium or abroad.
The Extra 4 is brewed in the classic 'single' style and is a light gold colored beer. It is a beer of high fermentation, bottle conditioned and full of flavors. It is brewed with more hops than usual for the other beers of Brewery St. Bernardus.
The Extra 4 will be available in limited quantities. "