Essential raw materials that go into the production of beer were water, barley malt, sugar, hops and yeast. Water, raw material extremely important in quantity and quality, comes directly from the source Tridaine. This source is fed by groundwater located near the abbey. Any chemical, physical or other is applied to the water naturally pure. As for the yeast, it is carefully guarded and preserved at the abbey. This is what will allow the conversion of sugars into alcohol. This yeast has mutated over time, became unique to the brewery and has its own strain.