Purest ingredients. Finest quality. Kellerweis is one of the only American Hefeweizens made using the traditional Bavarian style of open fermentation. This difficult and labor-intensive technique add uncommon depth and flavor complexity. Our hazy golden Hefeweizen is deeply flavorful, refreshing and perfect for a sunny day. Pure ingredients. Fine quality. 1968: A young Ken Grossman became a homebrewer when he brewed his first batch of beer, a stout. 1976: Ken opened a home-brewing shop in Chico, California. 1978: Homebrewing became legal in California. 1980: Ken started Sierra Nevada Brewing Co with just a few thousand dollars and some used dairy equipment. Today: Ken and his family own 100% of Sierra Nevada Brewing Co., one of the most successful independent craft breweries in America. 100% family owned, operated & argued over. sierranevada.com. Please recycle. Certified Zerowaste: US Zero Waste Business Council. Brewed & bottled by Sierra Nevada Brewing Co.