Auto-adjusting membrane for respiratory interface device

A respiratory interface device comprising:

• a mask having a faceplate and a patient contacting cushion, the patient contacting cushion coupled to, and extending about, the faceplate;
• a brace assembly comprising a brace body and at least one mask coupling, wherein the mask and the brace assembly body are coupled at the mask coupling, and wherein the mask coupling is a soft coupling;
• a gas source coupling device;
• the faceplate has an opening therethrough;
• the brace assembly has an opening therethrough, wherein the gas source coupling device extends through the brace assembly opening and into the faceplate opening, thereby coupling the mask and the gas source coupling device, and wherein the gas source coupling device being floatably coupled to the brace assembly at the brace assembly opening by a floating coupling;
• wherein the mask coupling includes a flexible membrane assembly, and wherein the flexible membrane assembly is disposed between the mask and the brace assembly body;
• and
• the flexible membrane assembly includes a first elongated member disposed in at least one location about the gas source coupling device, the first elongated member having a longitudinal axis that extends generally normal to the user's face.