It's the Laerdal® Face Shield, in a small soft pouch with brass key chain. 

• Helps overcome hesitation to start resuscitation
• Helps prevent direct contact with victim's mouth, nose and face
• Plastic sheet and 3M™ Filtrete™ hydrophobic filter helps prevent possible contact with victim's saliva or blood
• Bi-directional filter, and imprinted graphic directions for use
• Latex-free