The Cederroth respiratory mask is an aid for correct mouth-to-mouth resuscitation. It also reduces the risk of contact between rescuers and casualties. The respiratory mask consists of a plastic cloth with a non-return valve. Clear instructions printed directly on the cloth. Clear instructions for the mouth-to-mouth resuscitation method and the positioning of the mask over the casualty's face are printed on the plastic sheet. The non-return valve indicates which side (green) should face the rescuer and which side (red) should face the casualty's mouth. The size of the plastic cloth reduces the risk of the rescuer being exposed to the casualty's blood or vomit. The design of the mouthpiece forces the rescuer to open their mouth wide and close their lips tightly around the casualty's mouth to ensure a tight seal. The non-return valve is equipped with large holes. This reduces the resistance. In this way, the rescuer can maintain ventilation over a longer period of time.