The CPR MicroKey is the same as the MicroShield but with the added convenience of a key chain. The CPR MicroShield was designed to protect the rescuer and allow the rescuer to perform proper CPR according to the established guidelines and procedures. The one-way valve and single piece design will ensure that the barrier will not leak and will maintain its integrity when a rescuer is performing CPR. This shield will reduce the risk of cross-contamination and is made of a clear medical grade vinyl. The MicroKeyÆs come with a nylon case and a key ring which allows everyone to have easy access to their face shield.