Patient interface device with drawstring adjustment

A patient interface device, comprising:

• a patient sealing assembly having a cushion member for delivering a flow a breathing gas to a patient, a first attachment portion and a second attachment portion;
• and
• a headgear assembly for securing the patient sealing assembly to a head of the patient, the headgear assembly having a first drawstring, a second drawstring and a locking member structured to be positioned on a top of the head of the patient responsive to the patient interface device being donned by the patient, the first drawstring having a first distal end fixedly attached the first attachment portion and a first proximal end received through the locking member, the second drawstring having a second distal end fixedly attached the second attachment portion and a second proximal end received through the locking member, wherein the headgear assembly includes a sleeve member extending from a first side of the patient sealing portion configured to rest on the top of the head of the patient responsive to the patient interface device being donned by the patient, and first and second side members each being configured to extend along a respective side of the head responsive to the patient interface device being donned by the patient, wherein the first attachment portion is received within an end of the first side member and the first drawstring extends within the first side member along a length of the first side member to the central portion and the second attachment portion is received within and end of the second side member and the second drawstring extends within the second side member along a length of the second side member to the central portion, and wherein a fit of the patient interface device may be selectively adjusted using the first drawstring, the second drawstring and the locking member.