Various implementations include methods of identifying data for producing a user-customized mask, systems for producing the same, a user customized mask, and an elongated support. To produce the mask or elongated support, 3D-data is received that defines the contour and dimensions of at least a portion of user's face. The 3D-data is determined by analyzing vector data associated with an area around the nose and mouth of the user, for example. A contact area(s) and a face contacting surface within the contact area are identified on the portion of the face of the user based on the 3D-data. And, structure-data based on the 3D-data and the identified contact area is provided for designing and producing a mask contacting surface. The mask contacting surface causes a portion of the mask to match the contour of the face contacting surface of the user.