The ProTrainings CPR Face Shield Key Ring includes a CPR one-way-valve face shield packaged in a convenient key ring pouch constructed of durable vinyl webbing material. The pouch measures  2" x 1 3/4" x 3/4" with a 7/8" split key ring. Instructions on how to use the face shield can be viewed at http://www.profirstaid.com/en/training_video/adult-cpr-profa