With ALS, a patient is already challenged with weakening muscles for speaking and eating, a facemask only makes those activities more difficult with the mouth covered. Biphasic Cuirass Ventilation (BCV) is the only form of ventilation to be active on both phases of breathing, applied externally. This revolutionary method has advantages over other forms of ventilation. Help maintain respiratory muscle function with BCV’s provided inspiratory and expiratory assistance, range-of-motion exercising