Mao Cha Old Tree Pu-erh is a special find made from 50 to 100 year old Yunnan tea trees.  It is made similarly to white teas - withered in the sun for a few hours, then dried in a heated room at about 90°. The leaf is left to age where natural oxidation and fermentation from the organisms in the tea leaf create it's unique flavor.  Because of this process it has more of a green tea characteristic and is considered 'raw' (Mao Cha).  It is a complex tea, slightly 'sweet', with a lingering aftertaste.