A positioning and stabilising structure for a patient interface, comprising: a front section (6302, 11302) and a rear section (6304, 11304) forming a continuous loop of material, the front section (6302, 11302) forming a first bifurcated section with a first part and a second part; an upper textile portion (6310, 7310, 9310, 11310) comprising a resilient circumferential band for fitting to a patient's head in use, the upper textile portion (6310, 7310, 9310, 11310) formed from the rear section (6304, 11304) and from the first part; and at least one lower textile portion formed from the second part and being movably connected to the upper textile portion (6310, 7310, 9310, 11310); wherein at least a first lower textile portion of the at least one lower textile portion is stretchable relative to the upper textile portion (6310, 7310, 9310, 11310), and is constructed and arranged to provide a force to hold a seal-forming structure (6100, 7100, 8100, 9100, 11100) of the patient interface in a therapeutically effective position on the patient's head; and wherein the first lower textile portion is movable between a first position and a second position, the first lower textile portion configured to be proximate to the first part and to overlay the patient's frontal bone in the first position, and the first lower textile portion configured to be distal to the first part and overlay the patient's cheeks in the second position, wherein the first lower textile portion is integral with the upper textile portion (6310, 7310, 9310, 11310), wherein the rear section of the headband comprises a second bifurcated section comprising a second part of the upper textile portion and further comprising a second lower textile portion, and wherein the second part of the upper textile portion and the second lower textile portion are configured to overlay the patient's occipital bone in the first position, and wherein the second part of the upper textile portion is movable away from the second lower textile portion to overlay the parietal bone in the second position a front section (6302, 11302) and a rear section (6304, 11304) forming a continuous loop of material, the front section (6302, 11302) forming a first bifurcated section with a first part and a second part; an upper textile portion (6310, 7310, 9310, 11310) comprising a resilient circumferential band for fitting to a patient's head in use, the upper textile portion (6310, 7310, 9310, 11310) formed from the rear section (6304, 11304) and from the first part; and at least one lower textile portion formed from the second part and being movably connected to the upper textile portion (6310, 7310, 9310, 11310); wherein at least a first lower textile portion of the at least one lower textile portion is stretchable relative to the upper textile portion (6310, 7310, 9310, 11310), and is constructed and arranged to provide a force to hold a seal-forming structure (6100, 7100, 8100, 9100, 11100) of the patient interface in a therapeutically effective position on the patient's head; and wherein the first lower textile portion is movable between a first position and a second position, the first lower textile portion configured to be proximate to the first part and to overlay the patient's frontal bone in the first position, and the first lower textile portion configured to be distal to the first part and overlay the patient's cheeks in the second position, wherein the first lower textile portion is integral with the upper textile portion (6310, 7310, 9310, 11310), wherein the rear section of the headband comprises a second bifurcated section comprising a second part of the upper textile portion and further comprising a second lower textile portion, and wherein the second part of the upper textile portion and the second lower textile portion are configured to overlay the patient's occipital bone in the first position, and wherein the second part of the upper textile portion is movable away from the second lower textile portion to overlay the parietal bone in the second position