ResMed AirFit N30i
An under-the-nose nasal cradle mask with a tube-up design: air flows through a self-adjusting hollow frame to an elbow on top of your head. The frame and headgear are shared with the AirFit P30i, so you can switch between a cradle and a pillows cushion. No magnets.
Usually suits
- Nose breathers who change position at night or sleep on their stomach
- People who get bridge-of-nose marks from traditional nasal masks
- People who need a magnet-free mask
Design
- Tube-up design with the elbow on top of the head and 360 degree rotation
- Under-the-nose cradle cushion that avoids the bridge of the nose
- Self-adjusting frame with soft integrated sleeves
- Integrated QuietAir vent
- Quick-release elbow
- Same frame accepts the AirFit P30i pillows cushion and the AirTouch N30i fabric cushion
- Rated for 4 to 25 cm H2O
- No magnets
Strengths and trade-offs
- Tube on top of the head lets you sleep on your side, stomach or back without the tube in front of you
- Nothing touches the bridge of the nose
- No magnets
- One frame works with cradle, pillows or fabric cushions
- The frame sleeves and air path run along the cheeks, which some people find warm
- Not compatible with AirMini
- Two frame sizes plus four cushion sizes means more combinations to get right
- Nasal only, so mouth breathing needs a chinstrap or a different mask
Finding your size
Cushion size is set by nose width: Small up to 36 mm, Medium 36 to 46.5 mm, Small Wide 46.5 to 49 mm (small, flat noses) and Wide 49 to 60 mm (large, flat noses). Measure with a ruler or use ResMed's template at true scale, and pick the larger size if you fall between two. For the frame, ResMed's starting guideline is Standard for most men and Small for most women. It should sit on top of the head like a headband: if it feels tight and sits close to the forehead, it is too small; if it feels loose and sits far back, it is too large.
How to fit it
Choose frame and cushion
Measure your nose width for the cushion and start with the frame size ResMed suggests. The Small frame pairs with Small or Small Wide cushions; the Standard frame pairs with Medium or Wide.
Put the frame on like a headband
Place the cushion under your nose and bring the frame up over your head so the elbow sits on top. Then pull the back strap down behind your head.
Check the frame position
The frame should run over your cheeks and above your ears without pressing on them. If it sits close to your eyes or forehead, try the other frame size.
Adjust with the machine on
Lie in your usual position with the machine running and adjust the back strap until the cushion seals with light contact. The frame self-adjusts, so the strap only needs to hold it in place.
Common problems and fixes
Frame presses on the eyes or ears
That usually means the wrong frame size. ResMed's guide: if the frame falls back or sits close to the ears, try Small; if it sits forward or close to the eyes, try Standard.
Leak at the sides of the nose
Recheck nose width against the size chart; flatter, wider noses often need Small Wide or Wide. Re-center the cushion before tightening anything.
Elbow disconnects or tube pulls the mask
Route the tube above you with a hose hanger so it does not drag the frame when you turn over, and make sure the quick-release elbow has clicked fully into place.
Mouth leaks
Try a chinstrap. If you keep breathing through your mouth, ask your clinician about a full face option such as an under-the-nose full face mask.
Cleaning and care
Hand wash the cushion after each use in warm water with a mild liquid detergent. Wash the frame, sleeves, headgear and elbow the same way at least once a week. Rinse well and air dry out of direct sunlight, making sure the hollow frame is fully dry before reassembly. Do not use ozone or UV cleaning devices.
How often to replace parts
- Mask
- 1 complete mask every 3 months (Medicare A7034, nasal interface).
- Cushion
- Up to 2 per month (Medicare A7032, nasal cushion). This is typical insurer guidance; replace sooner if the cushion tears, hardens or stops sealing.
- Headgear
- 1 every 6 months (Medicare A7035).
Supplies that can help
A soft strap that supports the jaw to help keep the mouth closed, used mainly with nasal and nasal pillow masks to reduce mouth leaks.
A simple hook or hanger for drying CPAP tubing vertically after washing, and for keeping it off the floor.
A stand or arm that lifts the tubing above the bed so it does not drag on the mask when you turn over.
Pre-moistened wipes for a quick daily wipe of the mask cushion, mostly to remove skin oils between proper washes.
Plain, mild dish soap is the cleaning agent most CPAP makers and the FDA point to for masks, tubing and humidifier chambers.
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Frequently asked questions
Can I use AirFit P30i pillows on my AirFit N30i frame?
Yes. ResMed built the 30i series as one modular system: the N30i cradle cushion and the P30i pillows cushion use the same frame and headgear. The AirTouch N30i fabric cushion also fits.
Which AirFit N30i frame size is right for me?
ResMed's starting point is Standard for most men and Small for most women. It should sit on top of your head like a headband, not pressing toward your forehead or slipping back.
Does the AirFit N30i have magnets?
No. ResMed lists it as containing no magnets.
Can I sleep on my stomach with the AirFit N30i?
The tube-up design is intended for that: the tube connects at the top of your head, so there is no tubing in front of your face. You may need to position the pillow so it does not push on the cushion.
Sources
Last reviewed October 11, 2026. How we research · Report an error