A headgear for securing a patient airway interface device to a patient's head comprising a concave partial helmet having an outer surface and an inner surface and having a left lateral element, a right lateral element, a top portion and a back portion, wherein the left lateral element and the right lateral element are separated at a front half of the concave partial helmet by a void between the front half top portion of the concave partial helmet and the left lateral element and the right lateral element； when on the patient's head the top portion of the concave partial helmet terminates at the forehead of the patient's head with a front face of the top portion of the concave partial helmet that is proximal to the forehead having a stabilizer for supporting a hub and wherein the left lateral element and the right lateral element is structured to terminate on either side of a patient's face near a cheek portion without directly touching the check portion and wherein a section of the right lateral element and the left lateral element that is near the cheek portion includes an opening that permits passage of a strap from the outer surface to the inner surface and wherein a portion of the inner surface of the concave partial helmet that is structured to overlay the back half of the skull when the headgear is in use is separated from the patient's head by a pliable material that is attached to the inner surface.L'invention concerne une coiffe pour fixer un dispositif d'interface avec les voies respiratoires d'un patient sur la tête du patient, comprenant un casque partiel concave ayant une surface externe et une surface interne et comprenant un élément latéral gauche, un élément latéral droit, une partie de dessus et une partie arrière, l'élément latéral gauche et l'élément latéral droit étant séparés au niveau d'une moitié avant du casque partiel concave par un vide entre la partie supérieure de la moitié avant du casque partiel concave et l'élément latéral gauche et l'
