Nasal mask assembly

A nasal mask assembly, comprising:

• a relatively flexible cushion arrangement including a cushion that provides a breathing chamber and a face-contacting portion to form a seal around the patient's nose in use, an inlet tube supported by the cushion to deliver breathable gas into the breathing chamber for breathing by the patient, and three support members extending outwardly from the cushion;
• a relatively rigid frame provided to a front side of the cushion arrangement, the frame including three headgear attachment structures;
• and
• headgear including three headgear straps engagable with the three support members and the three headgear attachment structures to maintain the cushion arrangement in a desired position on the patient's face,
• wherein the support members are arranged in a triangular configuration so that, in use, one of the support members extends over a patient forehead region and the other support members extend over a respective patent cheek region to evenly distribute a headgear force to the cushion, to the forehead region and to the respective cheek region on the patient's face.