CPR masks are a must when performing CPR or rescue breathing as they help prevent transmission of harmful bacteria. Ambu, a name synonymous with quality resuscitation supplies, manufactures these CPR key chains. Branded with the Ambu logo, these 2" x 2" ultra-compact, easy to use CPR Res-Cue Keys feature CPR face shields with one-way valves (not just filters like some brands) that prevent cross contamination. Resuscitation is simplified since the latex free masks secure over the ears for hands-free operation. Essential operating instructions are printed on the semi-transparent barriers, which also allow the rescuer to monitor patient color and response. These are great as all around CPR masks, as one size fits children to adults. Each Ambu Res-Cue Key CPR keychain comes individually packaged with one CPR mask in a red nylon keychain pouch and an instruction card. Remember to put one of these CPR keychain masks in your 72 hour and first aid kits.