Our Soap Saver bags are made with agave plant fibers and completely machine-washable. Simply place the bar of soap inside the bag, close the top, and use the Soap Saver like a regular washcloth or loofah. The Soap Saver will exfoliate your skin and can be hung from a hook to allow the soap to dry in between uses. The Soap Saver does not need to be washed before every use.