A comfortable forehead cushion and enhanced StabilitySelector combine with our popular blue gel replaceable cushion to create a high level of comfort and stability. The unique sure seal technology (SST) provides a membrane-thin layer over the gel cushion to closely follow facial contours of both men and women, allowing more wearers to quickly achieve the comfortable seal they need. With ComfortGel Blue Full, your full-face mask patients finally have a simple and sensible way to enjoy the restful sleep they need. It’s one more way we’re helping you fit 100% of your patients, 100% of the time.