Mask system

A mask system for delivery of respiratory therapy to a patient, comprising:

• a mouth portion comprising:
• a mouth cushion adapted to form a seal with the patient's mouth, the mouth cushion comprising a recessed portion with a first outlet opening in a superior region of the mouth cushion;
• and
• a fascia that is more rigid than the mouth cushion and forms a mouth plenum chamber together with the mouth cushion, the fascia comprising a headgear connector and an inlet opening, the mouth plenum chamber being configured to receive pressurized, breathable gas through the inlet opening;
• a nares portion that is configured to nest within the recessed portion of the mouth cushion and comprises:
• a nares sealing portion adapted to form a seal with the patient's nares;
• and
• a plenum base that forms at least part of a nares plenum chamber and includes a nares portion opening, the nares plenum chamber being configured to receive at least a portion of the pressurized, breathable gas from the mouth plenum chamber through the nares portion opening;
• and
• a cushion clip configured to secure the nares portion to the mouth portion, the cushion clip comprising:
• a wall that is more rigid than the mouth cushion and the nares portion and forms at least part of a gas flow passage that pneumatically connects the nares plenum chamber to the mouth plenum chamber when the cushion clip is secured to the mouth portion and the nares portion;
• a first flange positioned on an outer surface of the wall, the first flange being inserted through the nares portion opening to engage an interior surface of the plenum base;
• and
• a second flange configured to secure the cushion clip to the mouth cushion,
• wherein the recessed portion of the mouth cushion and first outlet opening are oriented so that the pressurized, breathable gas flowing through the cushion clip flows in a posterior direction.