ResLab Medicals
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ResLab Medicals
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The mask frame, headgear and elbow assembly are not included — your existing F40 parts are reused.
Restore Your Seal Without Replacing the Whole Mask
A ResLab silicone replacement cushion designed for compatibility with the ResMed AirFit™ F40 full face CPAP mask. Replacing the cushion on schedule restores the seal, brings back comfort and keeps your therapy effective — at a fraction of the cost of a whole new mask.
The cushion is the only part of your mask that touches your face all night, and it's the part that wears out first. Soft silicone gradually stretches and softens with nightly use, facial oils and washing, and once it loses its shape the seal starts to break down — air escaping past your cheeks, water running into your eyes, a mask you keep tightening, or leak figures creeping up on your machine.
Made from soft, flexible silicone with no rigid components, this cushion adapts to your facial contours to reduce pressure points while holding a stable seal as you move. It removes and refits in seconds with no tools, and comes in three sizes so you can match your existing fit.
| Specification | Details |
|---|---|
| Brand | ResLab |
| Manufacturer | ResLab Medicals |
| Part Category | Compatible Replacement Part — not manufactured by ResMed |
| Product Type | Replacement Full Face CPAP Cushion |
| Compatible Mask | ResMed AirFit™ F40 Full Face CPAP Mask |
| Available Sizes | Small, Medium & Large [CONFIRM — see note on "Small Wide"] |
| Material | Soft Silicone Elastomer |
| Weight | Approx. 26 g [CONFIRM ResLab's own measured figure] |
| Therapy Pressure Range (AirFit F40 system) | 4–30 cm H₂O |
| Latex Free | Yes |
| Magnets in This Cushion | None |
| Magnets Elsewhere in the F40 Mask | Yes — the F40 headgear uses magnetic clips |
| AirMini Compatible | No |
| Washable | Yes — daily, in warm water with a mild soap |
| Recommended Replacement | Every 1–3 months, or as advised by your healthcare provider |
| Frame & Headgear | Not included — uses your existing F40 frame and headgear |
| Intended Use | Component of a full face mask for the treatment of Obstructive Sleep Apnoea (OSA) in Adults |
| Included in Package | 1 × Replacement cushion (selected size) |
All sizes fit the same F40 frame, so changing size later means a new cushion, never a new mask.
Cushions are not interchangeable between ResMed mask families — each is moulded to a specific frame. Check the model printed on your frame before ordering, and if you're unsure, ask us first.
A fresh cushion seals with far less tension than the worn one you're taking off, so your current strap settings will be too tight. Over-tightening a new cushion is the fastest way to wear it out early.
The cushion is the fastest-wearing part, but it isn't the only one with a schedule.
Regular cleaning extends the life of the cushion and helps maintain hygiene for safe, effective therapy.
This ResLab cushion restores the performance of your AirFit F40 without the cost of a full mask replacement. Its soft silicone construction conforms to your facial contours for a secure seal all night, and the cushion itself contains no magnetic components. Quick to replace and available in three sizes, it's the practical choice for keeping your therapy effective night after night — and because the frame and headgear stay as they are, your fit doesn't need relearning.
This is a ResLab replacement cushion and is not manufactured by or affiliated with ResMed. It is a component of a medical device used for the treatment of obstructive sleep apnoea under the direction of a qualified healthcare professional, and is designed for compatibility with the ResMed AirFit™ F40 full face mask. The mask frame, headgear and elbow assembly are not included and are sold separately.
Magnets and implanted medical devices. This cushion contains no magnets. However, the AirFit F40 headgear uses magnetic clips, so the assembled mask is not magnet-free. Magnets can interfere with implanted devices and metallic implants. Consult your doctor and your device manufacturer before using a mask with magnetic clips if you or anyone sharing your bed has:
If any of these apply, speak to your clinician about ResMed's non-magnetic headgear options before use, and keep magnetic components at least 150 mm from any implanted device. ResMed publishes a magnet addendum and a crosswalk guide covering which masks use magnets — ask us and we'll point you to them.
Confirm the cushion matches your exact mask model and size before use — an incorrect fit reduces seal quality and therapy effectiveness. Inspect the cushion regularly for cracking, stiffening or discolouration and replace it if the seal is compromised. Never block or modify the mask vent, which is how exhaled air leaves the mask; a blocked vent allows carbon dioxide to build up inside the mask. Cushions are single-user items and should not be shared between users.
Please refer to the official AirFit F40 user guide for complete information on contraindications, warnings, precautions and instructions for use, and consult your healthcare provider to determine whether this device is appropriate for the treatment of your obstructive sleep apnoea. If you notice persistent leaks, discomfort, skin irritation or any change in mask performance after fitting, discontinue use and consult your CPAP provider or healthcare professional.
Disposal and the environment. Do not dispose of this product with household waste. Dispose of it in accordance with local regulations for medical devices. Packaging materials are recyclable where facilities exist.
Trademark and compatibility. AirFit™, AdaptiSeal™, AirMini™ and ResMed™ are trademarks of ResMed Ltd. This product is a compatible replacement part manufactured by ResLab Medicals and is not manufactured, distributed, endorsed by, or otherwise affiliated with ResMed Ltd. All references to ResMed product names are made solely to identify the mask system with which this cushion is designed to be compatible. Fitting a compatible part may affect any remaining manufacturer warranty on your mask system — check with your supplier or clinician if this matters to you.
🛡️ For Machines : Every eligible product you purchase is backed by a 2-year manufacturer warranty, covering manufacturing defects and workmanship under normal use.
⚠️ For Masks & Accessories : CPAP
masks and mask components are covered by a 6-month warranty against
manufacturing defects only.
*Not covered: Normal wear and tear, misuse, improper cleaning, accidental
damage, or unauthorised modifications.
🚚 Free Next-Day UK Delivery : Orders placed before 3:00 PM GMT, Monday to Friday, are dispatched the same day using our next-day delivery service.
📖 Read More — To view our detailed Shipping policy
↩️ 30-Day Easy Returns : We offer a 30-day return policy on eligible items that are unused, unopened, and in their original sealed packaging. For hygiene and safety reasons, opened or used CPAP Machines, masks, cushions, and other personal-use accessories cannot be returned or replaced.
📖 Read More — To view our detailed Returns & Exchange policy
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