The effectiveness of the CPAP therapy is often determined by the quality of the mask. Masks can also have better functionality when used with machines that they are compatible with. And for devilbiss cpap, nothing is more compatible than the FlexSet Nasap CPAP mask. It is manufactured with silicone and enhances comfort with an adjustable frame that reinforces the masks seal while maintaining comfort. It has a one piece anchoring headgear which means that you have nothing to assemble and nothing to tangle. With a little adjustment, you can use it straight out of the box. It also has dual-pivoting mask bridge and forehead mask with soft Breathe-O-Prene Forehead pads for an enhanced fit. And with the Self-Directed Adjustable Exhaust Port you make sure that your bed partner sleeps soundly by diverting your exhaled air into somewhere else other than her face. Keep your Devilbiss CPAP machines working at its best with the Devilbiss FlexSet Nasal CPAP Mask!