Fisher & Paykel H Inc Opus Nasal Pillows Mask And Headgear, Latex-freeSmall, quiet and superbly comfortable, offering unprecedented freedom Slim-line design allows for almost any sleeping position without mask displacement Its innovative 360-degree, pivoting ball-and-socket elbow provides greater versatility With its new Silicone Pillows and facially Contoured Mask Frame for extra stability, patient comfort is paramount