Nasal mask system

A patient interface configured to deliver a supply of air at positive pressure to an entrance of a patient's airways, the patient interface comprising:

• (i) a nasal mask including a seal forming structure including a sealing flange constructed and arranged to form a seal on a portion of an upper lip of a patient, and to form a seal on a portion of a cartilaginous framework of a patient's nose, the nasal mask further including a plenum chamber adapted to receive a portion of the patient's nose including the pronasale,
• wherein the plenum chamber is pressurizable to a therapeutic pressure above ambient air pressure,
• wherein the plenum chamber includes an attachment region configured to fluidly couple to an air delivery system,
• wherein the plenum chamber further includes a side wall region extending between the seal forming structure and the attachment region,
• wherein the seal forming structure and the plenum chamber comprise a one piece molded construction,
• wherein the seal forming structure and the plenum chamber comprise a flexible, elastomeric material, and
• wherein the nasal mask further comprises a pair of headgear connectors, each of the pair of headgear connectors disposed on a respective side of the side wall region of the plenum chamber and integrally formed as part of the one piece molded construction;
• and
• (ii) a positioning and stabilising structure including a pair of side straps,
• wherein each of the pair of side straps is structured and arranged to connect to a respective one of the pair of headgear connectors to provide a two-point connection to the nasal mask, and
• wherein the positioning and stabilizing structure is constructed and arranged to be donned or removed without the pair of side straps passing inferior to the patient's ears.