Pu-erh is a fermented tea from Yunnan Province, China, the only tea category that actively improves with age, like a fine wine or whiskey. Sheng (raw) pu-erh starts bold and astringent and mellows over years into something smooth and extraordinarily complex. Shou (ripe) pu-erh undergoes controlled heap fermentation that mimics aging in months, delivering rich, earthy, dark-chocolate character ready to enjoy immediately. Pu-erh is prized for its digestive properties and collectability.