A patient interface to deliver of a flow of air at a positive pressure with respect to ambient air pressure to an entrance to the patient's airways including at least the entrance of a patient's nares while the patient is sleeping, to ameliorate sleep disordered breathing, the patient interface comprising: a seal-forming structure constructed and arranged to form a seal with a region of a patient's face surrounding the entrance to the patient's airways; a positioning and stabilising structure to provide a force to hold the seal-forming structure in a therapeutically effective position on a patient's head; and a connector assembly adapted to connect to an air circuit, the connector assembly comprising: a ring member configured to be removably and releasably secured in an aperture of an attachment region of the patient interface; and an elbow assembly configured to connect to the air circuit, the elbow assembly repeatedly connectable to and disconnectable from the ring member, the elbow assembly including an elbow member and a clip member, the clip member comprising a separate and distinct structure from the elbow member, and the clip member structured and arranged to connect to the elbow member, wherein the elbow member and the clip member comprise separately molded components that are subsequently connected to one another; wherein an outer surface of the elbow member is recessed such that the elbow member includes a recess configured and arranged to receive the clip member; and wherein the clip member is configured and arranged to releasably connect the elbow assembly to the ring member, and the elbow member is configured and arranged to form a seal with the ring member when the elbow assembly and the ring member are connected to one another. a seal-forming structure constructed and arranged to form a seal with a region of a patient's face surrounding the entrance to the patient's airways; a positioning and stabilising structure to provide a force to hold the seal-forming structure in a therapeutically effective position on a patient's head; and a connector assembly adapted to connect to an air circuit, the connector assembly comprising: a ring member configured to be removably and releasably secured in an aperture of an attachment region of the patient interface; and an elbow assembly configured to connect to the air circuit, the elbow assembly repeatedly connectable to and disconnectable from the ring member, the elbow assembly including an elbow member and a clip member, the clip member comprising a separate and distinct structure from the elbow member, and the clip member structured and arranged to connect to the elbow member, wherein the elbow member and the clip member comprise separately molded components that are subsequently connected to one another; wherein an outer surface of the elbow member is recessed such that the elbow member includes a recess configured and arranged to receive the clip member; and wherein the clip member is configured and arranged to releasably connect the elbow assembly to the ring member, and the elbow member is configured and arranged to form a seal with the ring member when the elbow assembly and the ring member are connected to one another. a ring member configured to be removably and releasably secured in an aperture of an attachment region of the patient interface; and an elbow assembly configured to connect to the air circuit, the elbow assembly repeatedly connectable to and disconnectable from the ring member, the elbow assembly including an elbow member and a clip member, the clip member comprising a separate and distinct structure from the elbow member, and the clip member structured and arranged to connect to the elbow member, wherein the elbow member and the clip member comprise separately molded components that are subsequently connected to one another; wherein an outer surface of the elbow member is recessed such that the elbow member includes a recess configured and arranged to receive the clip member; and wherein the clip member is configured and arranged to releasably connect the elbow assembly to the ring member, and the elbow member is configured and arranged to form a seal with the ring member when the elbow assembly and the ring member are connected to one another.