Ecozone soap nuts are economical and effective they save you money by replacing washing detergents the 1kg organic cotton bag holds enough soap nuts for 330 washes which is an average of 3p per wash organic allergy free laundry detergent hypo allergenic totally biodegradable works in all types of washing machines soap nuts have been used for thousands of years as a natural washing detergent by people native to both asia and the americas also known as soap berries the soap nuts grow on tree