The MDI CPR MICROSHIELD No. 70-160 Protection Pak allows quick and confident action. Very compact and easy to use, it provides a clear, flexible barrier and a positive one-way valve incorporated into a breathing tube which serves to maintain an open airway during mouth-to-mouth resuscitation.For greater assurance the Protection Pak offers a tamper-evident, waterproof pouch and one pair of disposable nitrile gloves. This packaging option is preferred by the professional responder.