A classic ESB strain from one of England's largest breweries. This yeast is best suited for English style ales including milds, bitters, porters, and English style stouts. This yeast will leave a beer very clear, and will leave some residual sweetness. NOTE: Due to the high degree of flocculation, this yeast has a very clumpy appearance in the package. Apparent attenuation: 63-70%. Flocculation: very high. Optimum temp: 65°-68° F