Wella Professionals Pure Purifying Shampoo. Bamboo extract is the special ingredient at the heart of Wellas Pure purifying shampoo. Its part of the Wella Professionals Care Balance range designed to restore the natural balance to hair and scalp. This deep cleansing shampoo cleans away all traces of hair product build-up while also removing pollutants and impurities that may be present. Hair is thus left clean and ready to be hydrated.