CPR masks are essential life-saving devices used to deliver rescue breaths to individuals in cardiac arrest during cardiopulmonary resuscitation (CPR). These masks create a barrier between the rescuer and the patient, enhancing safety by reducing the risk of cross-contamination and the transmission of infectious diseases. Designed with a one-way valve, CPR masks allow air to flow to the patient while preventing the rescuer's exposure to bodily fluids. They are crucial in emergency healthcare settings, first aid kits, and are used by healthcare providers and trained rescuers to ensure effective ventilation during resuscitation efforts.