The CPR MICROKEY-plus is the next generation of the MICROSHIELD. This one-size-fits-all CPR MICROSHIELD-plus, from Medical Devices International (MDI), offers a 6-inch-by-6-inch barrier shield along with a 2 cm. bite block/airway tunnel for adults and children. The filter, which provides additional protection, is located above the one-way valve to eliminate contact with the victim's fluids. The compact key pouch, offers the convenience of having protection readily available when responding to unexpected situations. The attractive nylon pouch is available in four colors: black, neon orange, royal blue and teal green.