ResMed Quattro FX Cushion

Quick answer: This is the genuine ResMed replacement cushion for the Quattro FX full face CPAP mask. The cushion is the dual-wall Spring Air™ silicone seal that rests against the face — the part that wears fastest, and the single most effective thing to replace to stop leaks and stop over-tightening your headgear. Available in Small, Medium, and Large. Frame and headgear are not included.

What’s included

• 1 × Quattro FX cushion (in your selected size)

Frame and headgear not included.

About this part

The cushion does the actual sealing work on the mask, and it’s a consumable by design. ResMed’s dual-wall Spring Air cushion has a soft outer membrane that conforms to the face and a self-adjusting inner wall that holds the seal as you move — but silicone softens, stretches, and loses its shape with nightly use, facial oils, and repeated washing.

The wear is gradual, so most people don’t notice the cushion itself — they notice they’re tightening the headgear more and more to stop leaks. That’s the tell: the straps aren’t the problem, the seal is. A fresh cushion restores the original fit at normal strap tension, and with it the comfort that keeps therapy consistent.

Key features

• Genuine ResMed cushion — for the Quattro FX full face mask.
• Dual-wall Spring Air™ silicone — conforms to the face and self-adjusts the seal.
• Restores a proper seal — stop over-tightening your headgear.
• Three sizes — Small, Medium, Large.
• Easy to swap — clips into the Quattro FX frame; no tools.

Specifications

Care & replacement

Wash the cushion daily in warm water with a mild soap, rinse thoroughly, and air dry away from direct sunlight — facial oils degrade silicone fastest. Replace it roughly every 1–3 months, or sooner if it feels sticky or stiff, looks cloudy or discoloured, has lost its shape, or if you find yourself tightening the headgear to stop leaks.

Frequently asked questions

What’s included?
The cushion only — the frame and headgear are not included.

Which mask does it fit?
The ResMed Quattro FX full face mask. (Note: this is the Quattro FX, not the Mirage Quattro — the cushions are not interchangeable.)

Which size do I need?
Match your current cushion size — Small, Medium, or Large. Use the ResMed Quattro FX sizing guide if you’re unsure.

How often should I replace it?
Commonly every 1–3 months, or sooner if it’s discoloured, misshapen, sticky, or leaking.

My mask leaks — do I need a whole new mask?
Usually not. A worn cushion is the most common cause of leaks, and replacing it costs a fraction of a new mask.

Do I need a prescription?
Replacement cushions are generally available without a prescription. Contact us if you’re unsure.

Can I get it delivered in Brooklyn or shipped nationwide?
Yes — Stark Medical Supplies offers local pickup and delivery in Brooklyn and across NYC, plus USPS shipping throughout the continental U.S.

Use this part with your ResMed Quattro FX mask according to the mask’s user guide.