A mask interface comprising: a mask seal sized and shaped to surround the nose of a user, and adapted to create at least a substantial seal with the user's face, the mask seal comprising: a seal inlet, a frame including； a frame inlet, a frame outlet, at least one attachment point configured to connect to headgear, and a connector for connection with a conduit that is in fluid communication with a gas delivery system, wherein the connector is configured to be rotatably coupled with the frame inlet, a coupling that couples the mask seal and the frame, the coupling comprising a coupling member, wherein the coupling member allows relative movement between the mask seal and the mask frame, wherein the coupling member is flexible and/or stretchable, and wherein the coupling member is integrated into the mask frame and removably attached to the mask seal, and wherein the coupling member provides a suspension mechanism between the mask seal and the frame.
