Rinenna is a laundry detergent that thoroughly removes protein stains (poo, blood, milk stains, etc.) and odors from the body. It is mainly used for soaking and removing stains and odors that are difficult to remove without scrubbing.
In addition to soaking, you can also use it in the washing machine as a regular laundry detergent. For more information, please see the end of the Rinenna #1 product list . 
