A patient interface 
assembly that includes a patient interface device, a headgear, and 
coupling member joining the interface device to a headgear 
assembly. In one embodiment, a spring biases the patient interface device against the patient's face when in use. In a further embodiment, the patient interface device is a nasal 
cushion that includes a formable support mounted to the nasal 
cushion for providing support and adjustment of the nasal 
cushion to improve fit and comfort. The headgear 
assembly in one embodiment is a semi-rigid, 
minimal contact harness assembly and includes an adjustment assembly that allows for a simultaneous adjustment of multiple straps. An adjustment assembly on the headgear provide a gross adjustment of the position of the interface relative to the patient and a biasing force to urge the patient interface device against the patient's face. In a further embodiment, a pair of rigid connecting members 
coupling the patient interface device to the headgear.