White Labs WLP885 Zurich Lager Yeast is a Swiss style lager yeast with minimal Sulfur and diacetyl production. If yeast is properly cared for, it can be used to produce lager beer over 11% ABV. This yeast works excellently in high gravity lager beers and has strong characteristics. 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.