Ultra-Compact Design
ResMed's smallest tube-down full face mask uses a minimal-contact design that rests softly yet securely under your nose.
Ultra-compact full face mask
ResMed AirFit F40
ResMed's smallest tube-down full face mask featuring a minimal-contact design that rests softly under your nose. Perfect for side sleepers and those who wear glasses in bed.
Ultra-Compact Design
AdaptiSeal Technology
Under-the-Nose Fit
ProfileUltra-compact full face
CushionAdaptiSeal silicone
Open viewGlasses-friendly fit
Sleep styleDesigned for side sleepers
Minimal. Maximized.
Less mask on your face, without giving up full-face therapy.
The AirFit F40 combines a low-profile under-the-nose fit with an adaptive cushion and a compact frame designed for comfort, movement, and an open field of view.
AdaptiSeal Cushion
Low-profile, soft silicone cushion adapts to your face to provide comfort through the night with proven seal performance.
Freedom of Movement
Designed to let you sleep in any position and move freely throughout the night, making it well suited to side sleepers and active sleepers.
Product video
See how the AirFit F40 is sized and fitted.
The original AirFit F40 fitting video remains available in a cleaner, focused product-support layout.
How to fit your AirFit F40 mask
Technical specifications
Product details, sizing, performance, and compatibility.
All technical information from the source page is retained and reorganized into a more readable product-detail format.
General Specifications
- Product NameResMed AirFit F40 Ultra-Compact Full Face Mask
- Mask TypeFull Face (Minimal Contact)
- DesignAdaptiSeal cushion technology
- Target UsersSide sleepers, glasses wearers
- Key FeatureUnder-the-nose fit
- Unique DesignSmallest tube-down full face mask
- AssemblyMagnetic clips, fewer adjustment points
- ManufacturerResMed Ltd.
Sizing & Fit
- SizesSmall/Wide, Medium, Large
- Small/WideNarrow to average facial features
- MediumAverage facial features
- LargeWide facial features
- Weight (S/W)Approx. 85g
- Weight (Medium)Approx. 90g
- Weight (Large)Approx. 95g
- Fit Success100% seal and comfort achieved
Performance
- Pressure Range4–30 cmH2O
- Max Flow60 L/min at 20 cmH2O
- Dead Space< 55ml
- Leak Rate< 20 L/min
- Sound LevelWhisper quiet operation
- Resistance< 0.4 cmH2O at 50 L/min
- Clinical Success100% seal achievement
- Ease of Use100% found easy to use
Compatibility
- CPAP MachinesAll standard CPAP/BiPAP devices
- Tube ConnectionStandard 22mm tubing
- Elbow TypeTube-down design with swivel
- HeadgearMinimalist design with magnetic clips
- CleaningDaily water rinse recommended
- MaterialsMedical-grade silicone
- Latex-FreeYes
- MRI SafeNo (contains magnets)
The AirFit F40 is ResMed's smallest tube-down full face mask with a revolutionary minimal-contact design. It rests softly under your nose rather than over it, making it perfect for side sleepers and those who wear glasses in bed. The AdaptiSeal cushion technology adapts to your unique facial contours, and clinical studies show 100% of patients achieved both seal and comfort.
Absolutely! The AirFit F40 is specifically designed with side sleepers in mind. Its ultra-compact, minimal-contact design allows for freedom of movement throughout the night. The under-the-nose fit reduces bulk and pressure points that can be uncomfortable when sleeping on your side, making it an ideal choice for active sleepers.
Yes! The AirFit F40's under-the-nose design makes it compatible with wearing glasses in bed. Unlike traditional full face masks that can interfere with eyewear, the F40's minimal contact design sits below the nose bridge, allowing you to comfortably wear glasses for reading or watching TV before sleep.
The AdaptiSeal cushion features a low-profile, soft silicone design that automatically adapts to your unique facial contours. This adaptive technology ensures a secure, comfortable seal that maintains effectiveness throughout the night, regardless of sleep position or movement. The cushion's flexibility provides personalized comfort while preventing air leaks.
Regular replacement ensures optimal performance and hygiene:
AdaptiSeal CushionReplace every 1 month or when seal effectiveness decreases.
Frame SystemReplace every 3 months or if damaged.
HeadgearReplace every 6 months or when straps lose elasticity.
Elbow ConnectorReplace every 6 months or if swivel becomes stiff.
Daily Cleaning
- Disassemble mask components
- Rinse cushion and frame with warm water
- Wash with mild soap (no harsh chemicals)
- Rinse thoroughly to remove soap residue
- Air dry completely before reassembly
Weekly Deep Clean
- Soak all components in warm soapy water
- Use soft brush for thorough cleaning
- Rinse multiple times with clean water
- Inspect for wear or damage
- Ensure complete drying before storage
Important: Never use bleach, alcohol, or harsh chemicals. Water temperature should not exceed 140°F (60°C).
Ultra-compact comfort
See if AirFit F40 is the right fit for your therapy.
Our sleep therapy team can help with mask fit, product questions, insurance guidance, and ongoing support for your AirFit F40.