The Reliever JetPak is a thoughtful combination massage that targets your lower obliques with an intense deep tissue massage while soothing your upper lateral muscles with a soothing kneading. The combination of these 2 massage types creates a therapeutic sensation all its own that can be found nowhere else. This unique combination of relaxation for the upper back and penetrating hydromassage for the lower back makes the Reliever many people's very favorite JetPak.