Rainshow'r is the pioneer in the shower filter industry. They are located in Southern California in the city of San Gabriel. They have been designing and manufacturing shower filters for over 20 years and have thousands of long time customers. They do not use, and will never use, activated carbon in their shower filters due to the inferior performance of carbon in a short-bodied, high temperature environment. Rainshow'r is committed to the idea that everyone deserves a safe, healthy, and chlorine free shower.