If your current AirFit F20 cushion is showing signs of wear, it’s time to think about a ResMed AirFit F20 replacement cushion. Getting the right one — in the right size, with the right features in mind — makes a real difference in comfort and seal quality. Here’s a complete guide before you buy.
What Is the AirFit F20 Replacement Cushion?
The AirFit F20 cushion is the silicone component of ResMed’s popular full face mask, designed to fit the same frame and headgear across the F20 mask system. As a CPAP full face mask cushion replacement, it’s built using InfinitySeal silicone technology — a single-piece design engineered to flex with facial movement and maintain a consistent seal throughout the night.
Key Features
- InfinitySeal silicone construction – a single, flexible piece that adapts to your facial contours rather than relying on separate seal zones
- Full nose-and-mouth coverage – delivers effective pressure whether you breathe through your nose, mouth, or both
- Washable design – can be cleaned daily with mild soap and water, unlike foam-based alternatives
- Compatible with existing AirFit F20 frames – no need to replace your entire mask system, just the cushion
- Multiple sizing options – available in Small, Medium, Large, and Wide to fit a range of face shapes
Why Cushion Replacement Matters
Even a well-fitted mask loses effectiveness over time. Silicone naturally loses some flexibility with repeated use, developing micro-cracks or a harder, less adaptive texture that can compromise your seal. Most users notice this after roughly 1–3 months of nightly use, which is why ResMed recommends periodic replacement rather than waiting until visible damage appears.
How to Choose the Right Size
Getting the sizing right is the most important part of ordering a replacement cushion. ResMed sizes the F20 cushion based on two measurements:
- The width of your nose
- The distance from the bridge of your nose to your chin
If you’re between sizes, most CPAP specialists recommend sizing down slightly for a tighter seal, or sizing up if you tend to sleep with your mouth open wider. Using a printable sizing template before ordering helps avoid guesswork.
Signs It’s Time to Replace Your Cushion
- Visible cracking, thinning, or discoloration
- A cushion that feels stiffer or less flexible than when new
- Increasing air leaks despite correct headgear tension
- A shiny, slightly hardened texture on the silicone surface
Fitting Tips for a New Cushion
- Snap the new cushion securely into the existing F20 frame before putting the mask on
- Adjust headgear tension evenly on both sides — avoid over-tightening, which can distort the seal rather than improve it
- Test the seal with your machine running before committing to a full night’s sleep with the new cushion
Where to Buy
You can order a genuine ResMed AirFit F20 replacement cushion, in the correct size for your mask, here:
👉 Shop the ResMed AirFit F20 Cushion – CPAPMedTrade
Replacing your cushion on schedule — rather than waiting for it to fail completely — keeps your CPAP therapy consistent, comfortable, and effective night after night.
