White Labs WLP850 Copenhagen Lager Yeast is a clean, crisp northern European lager yeast that is not as malty as the southern European lager yeast strains. it is great for European style pilsners, European style dark lagers, Vienna, and American style lagers. 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.