ResMed Quattro FX Full Face CPAP/BiPAP MaskThe ResMed Quattro FX Full Face CPAP BiPAP Mask with Headgear is the fourth generation full face mask from ResMed that provides superior seal and personalized comfort. The Quattro FX dual wall cushion with spring air technology accommodates movement during sleep. The MicroFit dial easily adjusts forehead support for a personalized fit and improved vent design to reduce noise. Key Features Spring Air dual wall cushion is soft on skin while providing a