Moon Works laundry powder is designed to be kind to the environment. It is gentle on delicate fabrics, contains no optical brighteners or sodium lauryl sulfate (a synthetic substance that acts as a detergent and can cause allergic reactions). Moon Works laundry powder is economical. It costs less per load than most other laundry products. Moon Works laundry powder creates NO SUDS, therefore no residue. It is a misconception that lots of suds equates to cleaner clothes.