SOAPNUTS, Soap Nuts or Soapberry, also sometimes referred to as Washing Nuts or Wash Berry are naturally grown and have amazing cleaning powers. The shells of these fruits/berries contain a natural substance called Saponin. Once they come in contact with water, they create mild suds similar to soap. This soapy substance has remarkable detergent properties, easily replacing normal detergents. It works effectively by removing dirt and dissolving oils from clothes and other surfaces.