ResMed AirFit F40 Full Face CPAP Mask

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Read our ResMed Full Face Mask Comparison Review to see how the F40 stacks up to the AirFit F10, F20, F30 and F30i.

Key Features:

  • Low-profile design with an open line of sight
  • 100% silicone AdaptiSeal cushion ensures a secure seal
  • Magnetic clips for easy fitting
  • Quick-release elbow easily disconnects/connects to hose
  • QuietAir diffused venting
  • Glasses-friendly
  • Flexible short tubing for your sleeping freedom
Product Details

ResMed AirFit F40 Full Face Mask

Upgrade your full-face sleep therapy experience with the innovative ResMed AirFit F40 CPAP Mask. Designed with side-sleeping in mind, the AirFit F40 is ResMed’s smallest tube-down full face mask.

With a soft silicone cushion that adapts to the face, fully flexible fabric frame and lightweight short tubing to help you sleep in any position, the F40 prioritizes both comfort and performance. 

A low-profile full face mask that delivers the high seal performance of traditional over-the-nose designs, the AirFit F40 lets users have it all: compactness and effectiveness.   

AdaptiSeal™ Cushion
Made completely of silicone, the AirFit F40 cushion moves and adapts to the face for a secure seal all night long. The soft silicone combines high seal performance with comfort, making it easier to stick to your sleep apnea therapy. 

Flexible Frame
The AirFit F40’s low-profile frame is fully flexible and features soft fabric arm sleeves for comfort. Resting high on the cheeks yet well below the eyes, the frame leaves room for you to wear glasses.   

Quick-Fit Headgear
With four adjustment points and snap on/off magnetic clips*, the AirFit F40 Headgear is easy to fit every single time.

Simply slide the headgear over your head, snap on the magnetic clips and adjust the four Velcro tabs for a secure yet comfortable fit. Removing the F40 is just as easy — pull the magnetic clips away from the mask and slide the headgear up and over your head. 

*Mask magnets should be kept at least 6 inches (150 mm) away from implants or medical devices that may be adversely affected by magnetic fields. Learn more about the ResMed CPAP Masks with Magnets Safety Update.

Short Tubing with Quick-Release Elbow
For the most natural sleeping experience, the F40 Full Face Mask features a short tubing that moves with you. It provides more slack in your CPAP circuit, so you can sleep comfortably in any position.

The short tubing attaches to the frame via a quick-release elbow, ensuring fast connection and disconnection from your CPAP setup.  

Multiple Headgear & Cushion Sizes
With three headgear sizes (small, standard, large) and three cushion sizes (small wide, medium, large), there’s an AirFit F40 mask for everyone.  

QuietAir™ Vent
The AirFit F40’s QuietAir™ vent ring disperses exhaled air away from you and your bed partner for a more peaceful night. Located in the cushion, the vent ring can be easily removed for cleaning.


How do I clean my AirFit F40 Full Face Mask? 
Daily cleaning: cushion, vent ring, short tubing with elbow
Weekly cleaning: headgear, frame

  1. Disassemble the mask prior to cleaning. Please refer to the user guide for complete disassembly instructions.
  2. Soak the mask parts in warm water with mild soap. Shake the parts in the water and use a soft bristle brush to gently clean the holes in the vent ring.
  3. Rinse thoroughly and air dry away from direct sunlight.  

The AirFit F40 should not be cleaned using a dishwasher or washing machine. 

How do I find my AirFit F40 cushion size?
The cushion size (SW, M or L) is located on the bottom right side of the cushion. You can use the AirFit F40 Fitting Template to find your best-fitting cushion size.

  1. Stand in front of a mirror and place the template under your nose. 
  2. Position your nose above the blue Medium cushion box. Check if your nose width and length fit into the box. Repeat the process with the purple Small-Wide and gray Large cushion box.
  3. Choose the cushion size that allows your nose to fit inside the box. If your nose fits into more than one box, choose the box that is the best fit for your nose width.

How do I find my AirFit F40 headgear size?
The F40 headgear size (small, standard or large) is located on the back of the headgear on the colored neck pad. We recommend starting off with the standard headgear, which fits most users comfortably, and then sizing up or down as needed. 

What machines are compatible with the AirFit F40?
The AirFit F40 is compatible with all CPAP and BiPAP machines except the ResMed AirMini. If using the F40 with a ResMed device, make sure to select “Pillows” in the mask setting option.  

Can I use the AirFit F40 if I tend to feel claustrophobic while wearing a mask?
The AirFit F40 is a low-profile, under-the-nose full face mask designed to minimize claustrophobia with its lightweight design.

I like to sleep on my stomach. Is the AirFit F40 for me? 
The AirFit F40 is optimized for side and back sleeping so stomach sleepers may find better comfort with a tube-up full face mask. These masks connect the CPAP hose at the top of the head, allowing for more freedom of movement during sleep.  

Technical Data
64600, 64601, 64602, 64603, 64604
Magnetic Clips
90 Days
Tube Connection
Front of the face
Headgear Clips and Type
Yes, magnetic clips
Headgear Size with Mask
Standard, Small or Large
Other Headgear Sizes Available
Other Headgear Styles Available
FitPack Available
Active Sleeper
Stomach Sleeper
Glasses Friendly
Specifically Designed For Women
Facial Hair
Cushion Interchangeable with Different Type
Extra Features
Pressure Range: 4-30 cm H2O
Item Includes
  • Frame
  • Short Tubing with Elbow
  • Cushion in the selected size (small-wide, medium, large)
  • Headgear in the selected size (standard, small, large)
  • Magnetic Headgear Clips (1 pair)
  • User Manual
Reviews (2)
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1 of 5 Stars!
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Subject: Mask
Thought I'd try this. It's comfortable but after a month I can't get it to stop leaking. Plus it's irritated my nose to a point that it's raw. And apparently respshop changed their mask assurance rules so now instead of being able to get a new mask I'm stuck with a $150 piece of garbage.

I am sorry this mask is not working for you! If you purchased it from Respshop, give us a call as we do have a mask assurance policy.

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5 of 5 Stars!
Howard H
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Subject: ResMed AirFit F40 Full Face CPAP Mask
This is the best full face mask I have ever used. I have been using an F20 AirTouch for years that was causing irritation on the bridge of my nose. With the F40 there is no contact with the nose bridge. F40 is lighter, more adjustable and more comfortable.
I have one caveat: The Large Head Gear is almost too large for me at 6 feet 200 pounds. I reordered a Standard Head Gear.
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Q&As (4)
Have a question on this item? Ask here and we will answer it in 12-24 hours, usually in a few business hours! Questions and answers will appear here after we answer. You may also have email notifications.
Can this be connected the the resmed airmini? I currently use the F20 connection.

It can only if you have the airmini tubing adapter as well as a standard hose. It will not connect to the regular airmini tubing.

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I need a size small, as my face is small. Will the head gear fit properly , or will it be loose?

The headgear can be adjusted with the velcro! There is an option for small headgear as well.

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When will the F40 be available through Apria?

You would need to contact Apria about that so they can assist you accordingly. Thank you!

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Currently using F30 mask. What is the difference between the new F40 and the F30 I currently use.

The main difference is the AdaptiSeal cushion on the F40 which is able to move and adapt to the face more freely as well as the flexible frame, the headgear is able to be adjusted but unlike the F30 it does not have an adjustment at the top of the head.

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