This invention is a respiration-related mask with a user interface for custom fitting the mask to a persons face. It comprises: a respiration-related mask that directs a breathable gas into a persons nose, mouth, or both two or more differentially and selectively movable members that are part of the mask, wherein differential and selective movement of these members changes the face-contacting contour of the mask and a remote user interface that allows the person to differentially and selectively adjust the movable members so as to better fit the face-contacting contour of the mask to the persons face while the person is wearing the mask. The resulting mask can conform to the contours of a persons face so that there are no places around the mask that fit too tightly (causing irritation, skin marks, and pain) and no places that fit too loosely (causing air leaks). This can increase patient tolerance of wearing a mask and can improve the therapeutic efficiency of wearing a mask.
