White Labs WLP665 Flemish Ale Blend is a blended culture used to produce the classic beer styles of the West Flanders region of Belgium. A proprietary blend of Saccharomyces yeasts, Brettanomyces, Lactobacillus, and Pediococcus, this culture creates a more complex, dark stone fruit characteristic. White Labs yeast is world-renowned for quality and innovation, certified kosher, GMO free, and subject to thorough quality analysis before being packaged.