The Dynarex Resp-O2 CPR Shield (100/Case) are designed for mouth-to-mouth resuscitation events, and provide a hygienic barrier between the responder and the patient's mouth. They come with 100 per case, and either individually wrapped or with a soft key-ring pouch included. The Resp-O2 CPR Shield is equipped with a one-way valve and a barrier filter that prevents blowback and cross-contamination on the responder while performing the head-tilt, chin-lift maneuver. They're also latex-free and DEHP-free. Features Dynarex Resp-O2 CPR Shield Features Latex-free and DEHP-free. Provides a physical barrier to protect the responder and the patient. Includes a one-way valve and barrier filter. Either individually wrapped or with a soft key-ring pouch. Configurations Dynarex Resp-O2 CPR Shield Configurations #36020: Individually Wrapped (100/Case). #36021: With Soft Case (100/Case). Literature Dynarex Resp-O2 CPR Shield Literature Dynarex CPR Products Brochure