Full Face vs Nasal CPAP Mask: Which Should You Choose?

The Mask Makes or Breaks Your Therapy

Your CPAP machine can deliver perfect pressure all night, but none of that matters if your mask doesn't work for you. The wrong mask leads to high leak rates, poor sleep, and the temptation to stop using the machine altogether.

The most fundamental choice is between a full face mask (covers nose and mouth) and a nasal mask (covers only the nose). There's also a third option, nasal pillows, which sit at your nostrils and deserve a mention. For a broader overview that covers all three categories side by side, see our CPAP mask types guide. Each type has clear strengths, and the right choice depends on how you breathe, how you sleep, and what pressure you need.

How Each Type Works

Full Face Masks

A full face mask creates a seal around both your nose and mouth. Air can enter through either airway, so the machine maintains pressure regardless of how you breathe.

The larger sealing surface means more contact with your face and more potential leak points. But for people who need this type, there's no substitute.

Popular pick: The ResMed AirFit F20 (opens in new tab) is one of the most widely used full face masks. Its InfinitySeal cushion adapts to different face shapes, and the magnetic clips make it easy to put on and take off in the dark.

Nasal Masks

A nasal mask covers just your nose, from the bridge down to your upper lip. The smaller footprint means less facial contact, a lighter fit, and fewer pressure points.

Because the mask only delivers air through your nose, you need to keep your mouth closed during sleep. For natural nose breathers, this happens automatically. Mouth breathers will need a chin strap (opens in new tab) or should consider switching to a full face mask.

Popular pick: The ResMed AirFit N30i (opens in new tab) is a nasal cradle design with the hose connecting at the top of the head. This keeps the tubing out of the way and makes it one of the best options for side sleepers.

Nasal Pillows

Worth mentioning as a third option. Nasal pillows are small silicone inserts that sit at the entrance of each nostril. They have the smallest profile of any mask type and feel the least intrusive. They work well at lower pressures but can become uncomfortable above 12–14 cmH2O as the direct airflow into your nostrils intensifies.

Who Should Choose What

The decision usually comes down to three factors: breathing style, sleep position, and pressure needs.

Choose a Full Face Mask If You...

• Breathe through your mouth during sleep (this is the primary reason; see our best masks for mouth breathers for specific recommendations)
• Have chronic nasal congestion or a deviated septum that limits nasal breathing
• Need higher pressures (above 14–15 cmH2O), where the dual-airway delivery feels more natural
• Have tried a nasal mask with a chin strap and still wake up with a dry mouth

Choose a Nasal Mask If You...

• Breathe through your nose naturally during sleep
• Sleep on your side (nasal masks have a much smaller profile against the pillow)
• Feel claustrophobic with a full face mask covering most of your face
• Want a lighter, less intrusive fit
• Use moderate pressures (6–14 cmH2O)

Choose Nasal Pillows If You...

• Want the most minimal mask possible
• Are a restless sleeper who moves frequently
• Use lower pressures (under 12 cmH2O)
• Have facial hair that interferes with cushion seals

Pros and Cons at a Glance

Factor	Full Face	Nasal	Nasal Pillows
Mouth breathing	Works perfectly	Requires chin strap	Requires chin strap
Side sleeping	Bulky, can shift	Good	Excellent
Back sleeping	Excellent	Excellent	Excellent
High pressure (15+)	Comfortable	Acceptable	Uncomfortable
Low pressure (6–10)	Fine	Great	Great
Claustrophobia risk	Higher	Low	Minimal
Leak potential	Higher (larger seal area)	Moderate	Lower
Facial hair compatibility	Poor	Moderate	Better
Field of vision	Restricted	Mostly clear	Clear
Weight on face	Heavier	Moderate	Lightest

The Pressure Factor

This is something many people overlook. Your prescribed pressure range affects which mask type will be most comfortable.

Full face masks distribute air across both airways, which makes higher pressures (15–20 cmH2O) feel more natural. The air has more room to flow, and you're less likely to feel like it's being forced into a single pathway.

Nasal masks work well through a wide range (roughly 6–14 cmH2O). Above that, some people report a sensation of pressure pushing against closed lips or an uncomfortable "blast" feeling in the nostrils.

If your machine is set to auto-adjust (APAP), check your 95th percentile pressure in your data. If it regularly hits 15 or above, a full face mask may be more comfortable. If it stays under 14 most nights, a nasal mask should work fine.

The Claustrophobia Factor

This is more common than people admit. A full face mask covers a significant portion of your face, and for some people, that triggers a feeling of confinement or anxiety.

If you've tried a full face mask and felt panicky, don't force it. A nasal mask with a chin strap can work just as well for many mouth breathers. Some people also find that wearing the mask while watching TV (before sleep) helps them adjust gradually.

Nasal pillows are the best option for claustrophobia since they barely touch your face at all.

Leak: The Hidden Difference

Leak rates tend to be higher with full face masks simply because there's more sealing surface. More edge means more opportunities for air to escape, especially during position changes.

This doesn't mean full face masks are worse. It means you should track your leak data and compare. A well-fitted full face mask with consistent leak under 24 L/min is better than a nasal mask that regularly spikes above 40 L/min because you're breathing through your mouth.

Use CPAP Clarity to compare. If you're trying a new mask type, import your SD card data before and after the switch. The leak rate chart will show you exactly how the two masks compare across full nights. You can spot patterns you'd never notice from the machine's basic average. Analyze your data free →

What About Hybrid Masks?

Some masks cover the mouth but use nasal pillows instead of a full nose cushion. The ResMed AirFit F30 is an example. These can be a good middle ground for mouth breathers who want a lower profile, though they share some of the pressure limitations of nasal pillows at higher settings.

Making the Switch

If you're thinking about switching mask types, here are a few practical tips:

1. Talk to your equipment provider. Many DME (durable medical equipment) suppliers will let you try a mask for 30 days. Take advantage of this.
2. Give it at least a week. The first night with any new mask feels strange. Give yourself 5–7 nights to adjust before judging.
3. Track your data. Compare AHI, leak rate, and usage hours between your old and new mask. Numbers don't lie.
4. Check your pressure settings. If you're switching from full face to nasal, your doctor may need to adjust your pressure. Full face masks sometimes require slightly higher pressure due to the larger internal volume.

What You Might Need

Depending on which direction you go, here are the key supplies:

• Full face masks (opens in new tab) (the F20 is the most popular starting point)
• Nasal masks (opens in new tab) (the N30i is excellent for side sleepers)
• Chin straps (opens in new tab) (if you want to try a nasal mask but sometimes breathe through your mouth)
• CPAP pillows (opens in new tab) (contoured cutouts prevent mask displacement for side sleepers)
• Replacement cushions (opens in new tab) (whichever mask you choose, fresh cushions make all the difference)

The Bottom Line

There's no universally "best" mask type. Full face masks are essential for mouth breathers and people on high pressure. Nasal masks are the better fit for nose breathers and side sleepers who want comfort and minimal bulk. Nasal pillows are ideal for low-pressure users who want to barely feel the mask at all.

The most important thing is to use your data. Track your AHI and leak rate with each mask, and let the numbers guide your decision. A mask that gives you low leak and low AHI is the right mask, regardless of type.