A breathing arrangement for use between a patient and a structure to deliver a breathable gas to the patient includes a patient interface including a mouth covering assembly including a cushion structured to sealingly engage around an exterior of a patient's mouth in use, a nozzle assembly including a pair of nozzles structured to sealingly engage within nasal passages of a patient's nose in use without forming a seal on a nasal bridge region of a patient's face, each of the nozzles including a dual wall construction including an inner wall and an outer wall that surrounds the inner wall, and a flexible element connecting the mouth covering assembly and the nozzle assembly.