Where is the breathing bag located in the BioPak?
The BioPak is designed with no breathing bag. Instead the BioPak is designed with a breathing chamber that contains a flexible diaphragm. This design provides a distinct advantage over a breathing bag design as it will provide shielding against penetration of the soft rubber diaphragm even with the upper housing not installed. A breathing bag design will be totally exposed to penetration hazards should the housing of the respirator become dislodged or breached.
