This invention concerns a respiratory mask for delivering inspiratory gas to a wearer. The respiratory mask has a mask body of generally concave shape and having a peripheral edge. The mask body being is formed of a first material and adapted to provide a cavity in use about the mouth and nose of a wearer such that the inhalation gas can be inhaled by the patient from the cavity. The mask body has an inlet port that is engageable with a supply of inhalation gas and in communication with the cavity. The mask body has a resilient seal formation depending from at least a portion of the peripheral edge. The mask body has at least one panel formed of a second material that is softer than the first material of the mask body so as to allow lateral deflection of the mask body to accommodate different facial widths.
