Spa Lavage features an open system class II medical device for colonic irrigation. The colonic session is facilitated by a licensed colon hydrotherapist (lic # MM34363, MA78533). The water used during the session is fluoride-free, filtered and passes through a UV light before entering the client. The nozzles are sterile and single-use (disposable). The client's comfort is the therapist's #1 concern.