The Ambu LifeKey is proven to be an easy to use and inexpensive barrier with a one-way valve which prevents direct contact with the mouth, nose and face of the patient and helps to get over hesitation to start resuscitation. The Ambu LifeKey helps protecting rescuer and increases bystander CPR in emergency situations. Semi-transparent face shield and one-way valve allows the helper to be able to carry out a visual check on the color of the lips of the patient and the vomit and helps to prevent contact with saliva or blood of the patient. Suitable for both adults and children. Elastic ear-band fits over the ears of the patient in order to keep the mask in place. Standard resuscitation techniques may be employed without modification. Ideal face mask that can be worn on a key ring, in a clothing bag, a small bag and a first aid kit.