ResMed Mirage FX Nasal CPAP Mask & Replacement Parts

The Mirage FX is ResMed's streamlined nasal mask built for people who want a simple, quiet fit that stays out of the way through the night. If you sleep on your side, shift positions, or read in bed before drifting off, the mask's slim profile and wide field of vision are the details that tend to matter most — and this collection keeps you supplied with the cushions, frames, and headgear that keep it performing.

Because a CPAP mask is only as good as its seal, most of what wears out first are the soft parts. The Mirage FX uses a dual-wall Spring Air cushion that flexes with facial movement to hold a seal without over-tightening, which is why many users replace the cushion every few months while the frame lasts far longer. Headgear straps eventually lose their elasticity too, and a stretched-out strap is a common — and easily fixed — cause of leaks and pressure lines in the morning. Matching your replacement parts to your existing mask by cushion size (typically Small, Standard, or Wide) is what preserves the original fit.

Cleaning is straightforward: hand-wash the cushion and frame daily in warm, soapy water and let the headgear air-dry, and you'll extend the life of every component while keeping the silicone free of skin oils that degrade the seal.

If the Mirage FX isn't quite right for your face shape or breathing habits, ResMed's broader Mirage line offers alternatives worth comparing. The Mirage Activa and Mirage Micro are also nasal masks with their own cushion technologies, while the Mirage Quattro covers both nose and mouth for those who breathe through their mouth at night. Nasal pillow fans often prefer the minimal contact of the Mirage Swift II or Mirage Liberty.