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This replacement cushion is designed for the Quattro FX and Quattro FX for Her full-face CPAP masks. ResMed's Dual-Wall Spring Air design distributes pressure evenly across your face and flexes to absorb movement, so the seal holds steady through a full night of shifting positions.
This is the correct replacement part if you already wear a Quattro FX or Quattro FX for Her mask and need a fresh cushion. Before ordering, confirm your exact frame size — unlike some ResMed cushions, Quattro FX sizing has zero flexibility, so getting the size wrong means a cushion that won't seat properly.
It's easy to assume any "Quattro" cushion will work on any "Quattro" mask, but that's not the case. ResMed makes three separate, non-interchangeable cushion families that share similar names:
Check your mask's exact model name before ordering — "Quattro," "Quattro FX," and "Quattro Air" are three different products.
The Spring Air design is built to spread pressure evenly across contact points rather than concentrating it in a few spots, which is part of what helps reduce the pressure marks and sore points that come with poorly-distributed full-face mask pressure.
The dual-wall construction absorbs slight movements as you shift through the night, rather than losing its seal the moment you turn over. That stability is what lets you sleep without worrying whether your next position change will trigger a leak.
Quattro FX and Quattro FX for Her masks use a separate frame for each size, so cushion sizes are not interchangeable. A Medium cushion will only fit a Medium frame; it will not fit a Small or Large frame. Always match the exact size printed on your current cushion or frame when ordering — don't guess based on general fit preference.
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Spec |
Detail |
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Brand |
ResMed |
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Compatible masks |
Quattro FX, Quattro FX for Her |
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Material |
Dual-Wall Spring Air silicone |
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Available sizes |
Small, Medium, Large |
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Frame compatibility |
Not interchangeable — cushion size must match frame size exactly |
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Recommended replacement |
Approximately every 30 days, or every 1–3 months based on wear |
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Prescription required |
No |
Need the full mask, not just the cushion? See the Quattro FX Mask with Headgear or Quattro FX for Her Mask with Headgear. Need the frame and elbow along with a cushion? See the Quattro FX Mask Assembly Kit. Have a different Quattro-family mask? See the Mirage Quattro Cushion or the Quattro Air / AirFit F10 Cushion. See more from the brand on the ResMed brand page.
No. Despite the similar names, the Mirage Quattro, Quattro FX, and Quattro Air are three separate, non-interchangeable mask families. This cushion only fits Quattro FX and Quattro FX for Her.
No. Quattro FX uses a separate frame for each size, so cushion and frame sizes must match exactly with no flexibility.
Check the size letter (S, M, or L) printed on your current cushion or frame, and order the matching size.
Approximately every 30 days, or every 1 to 3 months depending on wear, cleaning frequency, and use.
Check current availability at checkout, as "For Her" sizing sometimes runs a narrower range than the standard version. Confirm the size options shown match your current cushion before ordering.
No. Replacement mask parts like this cushion don't require a prescription. A prescription is only needed for the full mask and CPAP machine.
