YNR Black Rubber Rebreathing Bag Set 0.5 1 2 3 Litre Medical Hospital LungFeatures: Antistatic Breathing Bag 5 4 Litre range Made with Medical Grade Rubber With handling loop, complete with tail and ring Product Description: It helps to control breathing pressure and independent use of the inhalation and exhalation, training of the breathing muscles. The exercises with the breathing bag consist of inhaling from and exhaling into the bag, this increases the ability to use the inspiratory muscles (the intercostal muscles of