Custom adjustable patient interface device

A patient interface device, comprising:

• a cushion member structured to engage a face of a patient when the patient interface device is donned by a patient;
• and
• a frame assembly, the cushion member being coupled to the frame assembly, the frame assembly including a main frame member having a plurality of pocket members provided therein, and a plurality of peg members coupled to the main frame member, wherein the main frame member includes a central portion and a plurality of frame arms extending outwardly from the central portion, wherein each of the pocket members is located in a region in between an adjacent pair of the frame arms, wherein each peg member includes an arm member that is received and held within a respective one of the pocket members at a user selectable position, and wherein movement of the peg members relative to the main frame member adjusts a size and/or shape of the patient interface device.