PU-ERH teas are from Yunnan, China and are made from a large-leaf varietal. Because they go through fermentation after the initial oxidation process, pu-erh teas are considered some of the most unique and complex in flavor. They are traditionally compressed into bricks or cakes for purposes of storage and ageing. Flavor is impacted by that processing, specific terrior, and whether the tea is made as "raw" or "ripe."