Improved Gel Cushion Technology: Respironics has improved the ComfortGel material. The gel is now softer and conforms to your face with greater ease. Use the separate silicone membrane that snaps on, over the gel cushion, to increase the life of the cushion and provides a unique Sure Seal Technology (SST), contouring a seal around the Gel Cushion.
Angled Exhalation Micro Ports: The new diffusion vent and 360 Degree elbow disperses air softer and quieter than before. Respironics has decreased the overall size of each port, allowing several micro ports to fit on the elbow. The elbow angles the ports away from your bed partner and the micro size diffuses airflow quietly, reducing overall sound.