Jul 1st 2026

ResMed AirFit F30i vs F20 vs F40: Which Full Face CPAP Mask Is Best?

The AirFit F20 remains ResMed's most popular full face CPAP mask thanks to its traditional nose and mouth coverage, secure InfinitySeal cushion, and broad compatibility with diferent sleeping styles. However, newer options like the AirFit F30i and AirFit F40 ofer more minimal contact designs, making them appealing alternatives for active sleepers, side sleepers, and users who dislike traditional full face masks.

Quick Comparison (F30i vs F20 vs F40)

ResMed AirFit F30i Overview

Find the F30i here: ResMed AirFit F30i Full Face CPAP Mask with Headgear - GoCPAP

The AirFit F30i was designed to combine full-face therapy with greater freedom of movement. Unlike traditional full face masks, it routes the CPAP hose through a top of head connection, helping keep tubing out of the way throughout the night.

Who It Was For

The F30i was developed for users who found traditional front hose masks restrictive. Its under the nose cushion minimizes facial contact while the SpringFit frame adapts to movement during sleep.

Many side sleepers and active sleepers appreciate the F30i because they can comfortably change positions without pulling on the mask or hose. The open design also provides a clear line of sight for reading, watching TV, or wearing glasses before bed.

While the F30i remains available through some suppliers, many CPAP users now gravitate toward newer minimal contact options like the AirFit F40. The F40 ofers a similarly compact design while simplifying the overall mask structure for some users.

That said, the F30i continues to have a loyal following among sleepers who specifically prefer a top of head hose connection.

ResMed AirFit F20 Overview

Find the F20 here: ResMed AirFit F20 Full Face CPAP Mask with Headgear - GoCPAP

The AirFit F20 has become one of the most widely prescribed full face CPAP masks because it balances comfort, stability, and performance across a broad range of therapy pressures.

Coverage, Cushion, and Fit

The AirFit F20 uses ResMed's InfinitySeal cushion, which is designed to adapt to diferent facial contours while maintaining a reliable seal. Unlike under the nose designs, the F20 covers both the nose and mouth completely.

The mask includes QuietAir vent technology for quieter airflow, a quick release elbow for convenience, and a flexible frame that accommodates multiple sleeping positions.

Cushion sizes are available in small, medium, and large.

F20 vs AirTouch F20 (Memory Foam Version)

One of the unique advantages of the AirFit F20 is its compatibility with the AirTouch F20. Both masks share the same frame and headgear system, allowing users to switch between cushion styles.

The AirFit F20 uses a silicone InfinitySeal cushion, while the AirTouch F20 uses an UltraSoft memory foam cushion designed to provide a softer feel against the skin.

Magnet Recall: What You Need to Know

Current AirFit F20 masks include updated safety labeling regarding magnetic headgear clips. Users with certain implanted medical devices or metallic medical implants should review the manufacturer's guidance and consult their healthcare provider regarding mask compatibility.

For most CPAP users, the magnetic clips remain a convenient feature that simplifies putting the mask on and taking it of.

ResMed AirFit F40 Overview

Find the F40 here: ResMed AirFit F40 Full Face CPAP Mask with Headgear - GoCPAP

The AirFit F40 represents ResMed's newest generation of minimal contact full face mask design.

Minimal Contact Design

The F40 features a compact under the nose cushion that seals beneath the nostrils while covering the mouth. This design helps reduce contact with sensitive areas such as the nasal bridge, minimizing pressure points and red marks.

Its AdaptiSeal cushion is designed to conform to a wide variety of facial structures while maintaining a comfortable seal throughout the night.

Best for Side Sleepers and Glasses Wearers

Because the F40 sits lower on the face, users benefit from a wider field of vision compared to traditional full face masks. This makes it easier to read, watch television, or wear glasses before bed.

The lightweight frame and flexible cushion design also make the F40 a strong option for side sleepers who want a less bulky mask experience.

Which One Should You Pick?

If You're a Side Sleeper

The F40 is often the most comfortable option due to its compact profile and flexible cushion design. The F30i is another excellent choice because its top of head hose routing reduces tube interference.

If You Have Facial Hair or a Beard

The F20's InfinitySeal cushion generally provides the most forgiving seal around facial hair. Users with beards often experience fewer leaks with traditional full face cushions than with under the nose designs.

If You Feel Claustrophobic with Full Coverage

The F40 ofers the least facial coverage of the three masks. The F30i also provides a more open feel than traditional full face masks thanks to its under the nose cushion.

If You're a Mouth Breather at High Pressures

The F20 remains the preferred choice for many users requiring higher therapy pressures. Its full coverage InfinitySeal cushion is specifically designed to maintain a stable seal even at elevated pressure settings.

Newer Alternatives: AirFit F30i and F40

The original AirFit F10, and AirFit F30 helped establish ResMed's modern full face mask lineup, but with both now being discontinued; today's users typically choose between the F20, F30i, and F40.

The F20 remains the most versatile and widely recommended option, while the F30i appeals to users who want top of head tubing. The F40 delivers the newest minimal contact design and is becoming a popular choice for users seeking a lighter, less intrusive full face mask experience.

FAQs

What replaced the ResMed AirFit F10?

The AirFit F20 became the primary successor to the AirFit F10. It introduced the InfinitySeal cushion, QuietAir venting technology, and improved overall fit performance. Newer alternatives now include the AirFit F30i and AirFit F40.

Is the F20 or F40 better?

Neither mask is universally better. The F20 is often preferred for higher therapy pressures and traditional full face coverage, while the F40 is ideal for users seeking a smaller, more minimal contact design.

Do these masks fit any CPAP machine?

Yes. The AirFit F20, F30i, and F40 use standard CPAP tubing connections and are compatible with virtually all CPAP, APAP, and BiPAP machines.

Can I switch between F20 and F40 cushions?

No. The F20 and F40 use diferent frame and cushion systems. Their cushions are not interchangeable.

Looking to buy a full face mask today? Check out the links on GoCpap.com for the above masks, and all of our full face mask options below:

Full Face Masks: Masks - Full Face - GoCPAP.com