Unlike standard inflatable spas, HydroJet Pro tubs have multi-directional water jets installed strategically to aim at your back, legs, and feet. These HydroJet nozzles spray strong streams of water, giving therapeutic benefits similar to those of built-in spas. Whether you are relieving muscle soreness or simply enjoying a relaxing soak, the HydroJet system will make available a reinvigorating experience with every session.