Nasal pillow patient interface including the same

A nasal pillow adapted for use with a patient interface device (8), the nasal pillow comprising:

• an outer casing structured to define an interior area;
• base portion structured to interface the nasal pillow with the patient interface device, the base portion lying in a first plane;
• and
• an inner support structure disposed in the interior area, wherein a rigidity of the inner support structure is greater than a rigidity of the outer casing, the inner support structure having an upper opening defined by and upper edge of the inner support structure lying in a second plane, and a lower opening defined by a lower edge of the inner support member lying in a third plane, wherein the inner support structure is pre-loaded so that the third plane is parallel to the first plane and the second plane is disposed at an angle with respect to the first plane.