These shells (known as 'soapnuts') can be placed into your washing machine instead of detergent and fabric softener, and will leave your clothes clean, soft and without scent. Soap nuts have plenty of other uses beyond laundry! For a refreshing scent add a capful of Tinderbox laundry additive Tinderbox Laundry Additive.
Soap Berry (botanical name: Sapindus Mukorossi) are grown on trees in India and the foothills of the Himilayas. Each pack of soapnuts is supplied with a little calico pouch in which you place the nuts and then put in your washing machine.