ITEM NAME:5pcs first aid cpr face shield cpr masks one way valve sterilized pack M&O.Characteristic: The mask is small in size and can be carried in a pocket. It is a widely used CPR respirator in the world. It combines low resistance and one-way valves with water repellent filters to block liquids and secretions, and valves and filters serve as a barrier to separate the rescuers from the sick.
