Respiratory interface

A mask assembly comprising:

• a mask seal and headgear strap assembly;
• a ball socket portion having an internal ball socket surface;
• a fluid connector member comprising a first end and a second end;
• a ball end portion at the first end of the fluid connector member, the ball end portion including an outer ball end surface, an internal ball end surface inside the outer ball end surface, and a shoulder or groove at the internal ball end surface, the outer ball end surface being configured to fit within the internal ball socket surface;
• and
• a protrusion engaged with the shoulder or groove and configured to provide a swivelable connection of the fluid connector member relative to the mask seal and headgear strap assembly.