White Labs WLP640 Brettanomyces Anomalus is typically a barnyard funk with characters of fruitiness specifically towards pineapple and produces medium acidity. This strain can be used for primary fermentation, though it recommended to use a starter if making a larger ABV beer. White Labs yeast is world-renowned for quality and innovation, certified kosher, GMO free, and subject to thorough quality analysis before being packaged. This yeast comes packaged in White Labs' PurePitch packaging using the revolutionary FlexCell process, which creates yeast that has never been transferred or exposed to the environment. The PurePitch packaging is a recyclable, flexible material that allows for increased breathability, reducing the chance of gas buildup and maintaining the optimal environment for yeast.