A patient interface may include a plenum chamber pressurisable to a therapeutic pressure； a seal-forming structure constructed and arranged to form a seal with a region of the patient's face； a positioning and stabilising structure to provide an elastic force to hold the seal-forming structure on the patient's head, the positioning and stabilising structure may include a tie； a vent structure； a decoupling structure configured to provide a fluid connection between the plenum chamber and an air circuit for the flow of air at the therapeutic pressure for breathing by the patient； and a frame having at least one tie attachment structure to receive the tie, wherein the frame is configured to be resiliently movable in any direction having at least one of a component parallel to the patient's sagittal plane, a component parallel to the patient's coronal plane, a component parallel to the patient's Frankfort horizontal plane.
