This mask is equipped with a Demand System enabling spontaneously breathing patients to inhale 100% Oxygen. An inhalation effort by the patient will open the demand valve and oxygen will flow to the patient at a rate in line with their inhalation effort.

The current standard of care for a first responder sport diver in dealing with a non-breathing patient is oxygen supplemented mouth-to-pocket mask resuscitation. The CPR barrier combines a low-resistance, one-way valve with a hydrophobic filter to help prevent the passage of liquids and secretions. Valve and filter act as barriers separating rescuer and patient.

This mask is supplied with a reservoir bag attached by a one-way valve so the victim can breathe oxygen that is delivered into the bag, but cannot exhale carbon dioxide back into the bag. The nonrebreather is used to deliver high concentrations (as a percent of inspired air, 80% to 90% oxygen at flow rates of 10 to 15 liters per minute) of oxygen.