Some of our hotel products contain sodium laureth sulfate (SLES) is a surfactant that is responsible for the lather or bubbles in a shampoo or body wash. It can be manufactured from plant or petroleum sources (ours is plant derived). It has a low hazard score of 3 from the Environmental Working Group (EWG). There has been concern about this ingredient because of possible contamination during manufacturing. There is no evidence linking SLES to cancer or infertility. Because there is controversy behind this common ingredient, we removed it from our retail products.