US Aristech AcrylicThe Acrylic shell material is from US Aristech with good quality, it is stable onthe low& hightemperature, very easy to clean & wipe, can be used many years. There are 12 kinds of colors for your selection.JOYSPA Water Jets & Floating FiltersFrom the full-body massage, to concentrated neck and shoulder relief, to lounger and cool-down seats, you get the spa experience that's just right for you.