"Ecozone’s naturally and sustainably sourced Soap Nuts are an organic, allergy-friendly, economical and effective alternative to common laundry detergent. The 300g organic cotton bag holds enough nuts for 100 washes. Each dose of nuts is also re-usable for up to four times.Soap Nuts are gentle on your skin and clothes, and ensure that colours stay brighter for longer. Additional key attributes: completely organic, hypoallergenic and biodegradable.A little note: Soap Nuts have been used for thousands of years as a natural washing detergent. Also known as Soap Berries, they grow on trees of the Sapindus genus and are a source of Saponin, a natural soap which cleans and freshens your clothes."