Delivery of respiratory therapy

A respiratory mask for delivering breathable gas to a patient for positive airway pressure treatment, comprising:

• a cushion including an orifice formed therein, the cushion being configured in a gasket arrangement around an entrance to an airway of the patient and in fluid communication therewith, in use,
• wherein the cushion is configured to, in use, sealingly engage an underside of the patient's nose without any sealing contact above the patient's nose tip,
• wherein the cushion is constructed from foam,
• wherein the cushion is attached to a support structure and the support structure imparts curvature to a sealing surface of the cushion, when compared to the cushion's unattached configuration, and
• wherein the cushion conforms to the shape of the support structure, to impart the curvature to the sealing surface of the cushion, once the cushion is attached to the support structure and before the mask is worn by the patient.