The AEROSx Respiratory Resistance Lung Trainer, a cutting-edge lung breathing device, allows you to perfect your breath control technique with ease. By practicing deep inhalation through the nose and exhaling powerfully through the mouth, or vice versa, you'll be amazed at how quickly you can strengthen your respiratory muscles. Level up your performance and breathe your way to success with the AEROSx - the ultimate choice for the everyday person or fitness enthusiasts.