Blond barleywine Pays d’Erpigny is a full bodied Barley Wine with a delicious sweet flavour that is perfectly suited for barrel ageing. Pays d’Erpigny uses Morpheus yeast; Alvinne's house yeast strain. Alvinne produces world-class sour beers. Alvinne works hard to uphold their reputation, which Alvinne showcase by serving their beer in top bars worldwide.