The CPR mouth barrier is made from clear plastic. Unlike many CPR masks that have a detachable single-use, one-way valve, our masks are designed with the valve integrated into the CPR breathing barrier. This offers maximum protection to the rescuer and prevents 99% of contaminants passing through. The CPR mask also features soft, elastic ear loops to secure it to the victim’s face. Intuitive and easy to use, the mask fits easily onto the victim’s face within a matter of seconds.