The Headgear for Quattro™ FX for Her Full Face CPAP Mask is the replacement headgear for the Mirage Quattro FX for Her Full Face Mask and will not work with the Original Mirage Quattro. This headgear is pink in color and is a bit smaller than the Male version. The headgear features a crown-shaped design and has attachment straps that go above and below each ear. There is no bulky forehead pad, so you'll be able to move freely with your Quattro FX headgear piece. Compatibility. This headgear piece is designed for the Quattro FX only: it will not work with ResMed's original Mirage Quattro design. Additionally, this is just the headgear: it does not include the headgear clips. Quattro FX. The Quattro FX was designed with the comfort of sleep apnea therapy patients in mind. The unobtrusive interface allows users a clear line of vision, and the comfortable headgear straps are flexible, allowing you to sleep in any position you find comfortable.