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Slip into sleep with the ALL NEW ResMed AirFit F40! The F40 is an ultra-compact full face CPAP mask designed to provide comfort and freedom throughout the night with reduced pressure on the nose. This innovative mask offers a soft silicone cushion and a low-profile structure, allowing you to sleep in any position and move freely.

100% Universal Fit

In a ResMed external clinical study, the AirFit F40 achieved seal and comfort for 100% of patients surveyed, ensuring a snug fit without compromising comfort.

Ultra-Compact Design

The AirFit F40 offers minimal facial contact and maximized comfort thanks to the under-the-nose cradle fit, which reduces bulk, limits feelings of claustrophobia, and keeps an open line-of-sight for your bedtime wind-down.

Easy On-and-Off Magnetic Headgear

The magnetic clips allow for quick and easy fitting or removal of the mask, reducing hassle before bedtime and upon waking. A redesigned quick-release elbow also makes it easier than ever to quickly disconnect for middle-of-the-night bathroom trips.

AdaptiSeal Cushion

The AdaptiSeal silicone cushion adapts to your facial contours, providing comfort and maintaining an effective seal throughout the night.

Flexible Frame Moves With You

The fully flexible frame, covered by soft nylon fabric padding, sits below the eyes for comfort and reduced facial marks. It allows for easier movement during sleep without compromising the seal.

Short Tube Reduces Hose Pulling

The short tube reduces drag and moves with you, providing the flexibility to sleep comfortably in any position and ensuring continuous therapy.

Ideal For

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The AirFit F40 is an excellent choice if you…

  • Breathe through your mouth and/or nose
  • Are an active sleeper who changes positions frequently
  • Want a mask that lets you sleep on your side or stomach
  • Experience claustrophobia from traditional full face masks
  • Need an open line of sight to read or watch TV before bed
  • Want to wear glasses with your mask
  • Prefer an under-the-nose cushion that won't put pressure on the nose
  • Want a mask you can get in and out of quickly

Tips & Resources

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Product Review: AirFit F40 Review

Product Manual:
AirFit F40 User Guide

Product Sizing Guide: AirFit F40 Sizing Guide

Using Your Mask for the First Time

  • Connect the CPAP hose to the mask elbow
  • Release elbow from the frame by squeezing the quick release tabs
  • Ensure headgear clips are detached from the frame
  • Hold the cushion in place under your nose and over your mouth
  • Pull the headgear over your head
  • Attach the lower headgear straps using the magnetic clips
  • Adjust the upper and lower head straps until the mask fits comfortably
  • Reattach the elbow and hose to complete assembly

Magnetic Clip Warning

This mask uses magnetic clips to secure the frame into place without having to adjust the mask’s velcro head straps. These magnets are not safe when  used with certain medical implants including: 

  • Pacemakers, 
  • Implantable Cardioverter Defibrillators (ICD)
  • Neurostimulators
  • Cerebrospinal Fluid (CSF) Shunts
  • Insulin/Infusion pumps
  • Aneurysm Clips
  • Flow Disruption Devices
  • Embolic Coils
  • Stents
  • Valves
  • Electrode
  • Hearing Aids 

Mask Safety Features

The mask has two main safety features, exhaust vent holes and anti-asphyxia valves, which ensure normal breathing and proper exhalation. Avoid blocking these vents to maintain safety and therapy quality. Regularly inspect these areas to ensure they remain undamaged and free of obstructions.

Finding Your Perfect Fit

The AirFit F40 is available in three frame sizes, including small, standard, and large. Most people fit into the standard size, so it's best to start with this headgear and then order the small or large size if necessary.

Cushion sizes are offered in small-wide, medium, and large. If you do not know your cushion size, we suggest ordering an AirFit F40 Starter Pack, which comes with all three cushion sizes, so you can test them out. You can also check out the sizing guide linked above.

Selecting Your Cushion Size

If you currently own an AirFit F40 and are looking to re-order your current mask size, you can find your mask's cushion size by checking the plastic shell of your mask cushion. On this cushion, you will see an SW, M, or L indicating the size of your cushion.

Care & Cleaning

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Care & Cleaning Notice

The following information includes recommended instructions for the general care and maintenance of our CPAP masks. Please review your mask's product manual for further details, including dishwasher safety notes.

Mask Part Replacement Schedule

  • Cushion: Every 1-3 Months
  • Headgear: Every 6 Months
  • Mask Frame: Every 12 Months

Disassembling Your Mask

  1. Undo the fastening tabs on the upper headgear straps and pull from the frame.
  2. *Tip: Keep the magnetic clips attached to the lower headgear straps to easily distinguish the upper and lower straps when reassembling. 
  3. Squeeze the side buttons on the elbow and detach from the vent ring. 
  4. Pull the cushion stud out of the frame stud hole, repeat on the other side. 
  5. Pull the vent ring from the cushion.

Daily Cleaning

  1. Disassemble mask
  2. Wipe cushion clean and wash elbow, vent ring, and short tube with soap and water
  3. Leave pieces to dry out of direct sunlight
  4. Do not reassemble until mask parts are fully dry

Weekly Cleaning

  1. Disassemble mask completely
  2. Wash frame, elbow, vent ring, cushion, and headgear in warm water with mild soap
  3. Rinse each component thoroughly
  4. Allow all parts to dry away from direct sunlight or heat
  5. Do not reassemble mask until all parts are fully dry

Specs

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Sound Level

21.2 dBA

Dimensions

5.12" L x 3.74" W x 9.65" H

Weight (lbs)
  • 9.6 oz
Pressure Range Low

4 cmH20

Pressure Range High

30 cmH2O

Cushion Material

Silicone

Cushion Size(s)

Large Cushion with Medium Frame

Headgear Size(s)

Standard

Mask Frame Size(s)

Standard

Headgear Materials
  • Nylon
  • Spandex
Frame Materials
  • Flexible Nylon
Warranty

Internal Free 30-Day

Includes Magnets

YES

Part Number

64602

What's Included

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This product includes everything you need to wear your CPAP mask. However, your CPAP machine and hose must be purchased separately.

ResMed AirFit F40 Full Face CPAP Mask with Headgear - CPAP.com
AirFit F40 Full Face Mask
Standard Headgear
Large Full Face Cushion
Short Tube
Quick-Release Elbow
User Guide

FAQs

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Is the AirFit F40 comfortable for side sleepers?

Yes, the AirFit F40 has a unique design that fits well but won't get in the way while side sleeping. It also has a swivel hose connection that adjusts your hose position if you turn on your side.

Is the AirFit F40 compatible with all CPAP machines?

The AirFit F40 is compatible with most CPAP machines, however it may not be compatible with all travel machines. If you have questions about mask compatibility, you can call our CPAP Guide team.

Does the AirFit F40 prevent air leaks?

While no mask can prevent 100% of air leaks, the AirFit F40 features ResMed's InfinitySeal technology to create a strong seal between your face and your CPAP mask, while still remaining comfortable and flexible.

How often should I replace the AirFit F40's cushion?

For best performance, ResMed recommends replacing the AirFit F40's silicone cushion every 3 months.



Is the AirFit F40 suitable for full-time mouth breathers?

Yes, the full face design of the AirFit F40 provides an effective seal for mouth breathing all night long.

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