Made by Guelph's own Escarpment Labs Yeast Company. This is their Cream Ale strain. Here is what they had to say about it: This is a blend of a popular ale and lager strain produced at Escarpment Labs. These two strains work together to create a clean and crispy lager-style American ale. Expect some sulfur from the lager yeast during fermentation which results in a refreshing finished product.