White Labs WLP001 California Ale Yeast is a liquid yeast that is famous for its clean flavors, balance, and ability to be used in almost any style ale. It accentuates hop flavors and is extremely versatile. White Labs yeast is world-renowned for quality and innovation, certified kosher, GMO free, and subject to thorough quality analysis before being packaged. The California Ale Yeast includes the Gel Ice Pack and Foam Coolers to ensure the yeast survives the transportation.