A patient interface assembly that includes a patient interface device and a headgear. The headgear includes a first headgear strap and a second headgear strap having first end portions connected to opposite sides of the patient interface device. Second end portions of the first headgear strap and a second headgear strap are coupled to a first beam member and a second beam member respectively. The first and second beam members extend behind a head of such as user during use and are joined together via an adjustment mechanism that allows the overall length of the first beam and the second beam to be selectively adjusted.
