ResMed Nasal Cushion - Mirage FX

This replacement cushion is compatible with all Mirage FX and Mirage FX for Her CPAP and BiPAP masks. It uses a dual-wall Spring Air design that spreads pressure evenly across the cushion, aiming to reduce the red marks and pressure points common with cushions that concentrate pressure in just a few spots.

Is This the Right Cushion for You?

This is the correct replacement part if you already wear a Mirage FX or Mirage FX for Her mask and need a fresh cushion. Before ordering, confirm your exact frame size — Mirage FX cushion sizes are not interchangeable, so getting the size wrong means a cushion that won't seat properly on your frame.

Key Features at a Glance

• Dual-wall Spring Air design for even pressure distribution
• Removed under-cushion at the nasal bridge to reduce soreness there
• Soft-touch frosted texture against the skin
• In-molded vent ring for quieter air dispersion
• Compatible with Mirage FX and Mirage FX for Her masks
• Available in Standard, Wide, and Small

Why Choose This Cushion

Even Pressure, Fewer Red Marks

The dual-wall Spring Air cushion distributes pressure across the entire contact area rather than concentrating it in a few spots. Cushions that hold pressure unevenly tend to leave red marks and sore points behind — this design is built specifically to spread that load out for a more comfortable, secure seal.

A Softer Nasal Bridge

This cushion removes the under-cushion typically found at the nasal bridge, which reduces pressure, soreness, and discomfort in one of the most sensitive spots on a nasal mask. The soft-touch frosted texture around the rest of the cushion is designed for the same reason — comfort against skin that's in contact for hours every night.

Quieter Therapy for You and Your Partner

An in-molded vent ring disperses air quietly and gently away from you and your sleep partner. Without it, exhaust air disperses more loudly, which can disturb sleep for both of you — particularly if you start therapy before you're actually asleep and are still reading or watching TV.

Sizing — Not Interchangeable

The Mirage FX series uses a separate, matched frame for each cushion size, so cushion sizes are not interchangeable. A Wide cushion will only fit a Wide frame; a Small cushion will only fit a Small frame. Each cushion has its size embossed on the bottom:

Check the label on your current cushion before ordering to make sure you get the size that matches your frame.

Specifications

Complete Your Mirage FX Setup

Need the full mask, not just the cushion? See the Mirage FX Mask with Headgear or Mirage FX for Her Mask with Headgear. Need the frame and elbow along with a cushion? See the Mirage FX Mask Assembly Kit. Need replacement headgear too? See the Mirage FX Headgear. See more from the brand on the ResMed brand page.

Frequently Asked Questions

Can I use a Wide cushion on a Standard frame?

No. Mirage FX uses a separate frame for each cushion size, so cushion and frame sizes must match exactly.

How do I know what size cushion I need?

Check the label on the bottom of your current cushion. "Mirage FX" is Standard, "Mirage FX Wide" is Wide, and "Mirage FX Small" is Small. Order the size that matches.

Does this fit the Mirage FX for Her mask too?

Yes. This cushion is compatible with both the standard Mirage FX and Mirage FX for Her masks.

Will this cushion reduce noise?

Yes. The in-molded vent ring is designed to disperse exhaled air quietly and gently, reducing noise for you and your sleep partner.

How often should I replace this cushion?

Replace it when you notice reduced seal, visible wear, or discoloration, generally every 1 to 3 months with regular use.

Do I need a prescription to buy a replacement cushion?

No. Replacement mask parts like this cushion don't require a prescription. A prescription is only needed for the full mask and CPAP machine.