CPAP masks come in four main types: nasal masks, nasal pillows, full face (oronasal) masks, and hybrid masks. Each delivers pressurized air differently, covers a different portion of your face, and suits different breathing habits and sleep positions. Choosing the right one has a real impact on comfort and whether you actually stick with treatment.
Nasal Masks
Nasal masks are the most commonly recommended starting point for CPAP therapy. They cover only the nose, sitting just above the upper lip and near the inner corner of the eye without compressing the sides of the nose. This mid-range design provides a stable seal without covering too much of your face, making it a good balance between security and comfort.
Nasal masks work best if you primarily breathe through your nose during sleep. They tend to require lower pressure settings than full face masks. In one study comparing mask types, nasal masks had a median pressure of 10 cmH₂O, compared to 12 cmH₂O for full face masks. That lower pressure translates to less air force on your face and fewer leak problems. The tradeoff: if your mouth falls open during sleep, air escapes and therapy becomes less effective. A chin strap can help, but if mouth breathing persists after a month of trying, a different mask type is usually the better fix.
Nasal Pillows
Nasal pillows are the smallest, lightest option. Instead of a cushion that surrounds your nose, two soft inserts sit just inside the nostrils. They have minimal contact with the face, which makes them popular with people who feel claustrophobic in larger masks or who wear glasses before bed. Side sleepers also tend to prefer nasal pillows because there’s less bulk to press into a pillow and shift out of place.
The compact design does come with limitations. Because the seal point is small, higher pressure settings can feel uncomfortable or cause air to blast directly into the nostrils. Nasal pillows also aren’t a solution for mouth breathing on their own. And if you have frequent nosebleeds or significant nasal congestion, the direct nasal contact can be irritating. But for nose breathers who want the least intrusive option, nasal pillows are often the most comfortable choice.
Full Face Masks
Full face masks, also called oronasal masks, cover both the nose and mouth. They’re the go-to option if you breathe through your mouth at night or deal with chronic nasal congestion that makes nose-only breathing unreliable. Because air can enter through either route, you don’t lose therapy effectiveness when your mouth opens.
The larger footprint means more contact with your face, which creates a few practical considerations. Full face masks generally require higher pressure to maintain the same therapeutic effect. Research in the Journal of Clinical Sleep Medicine found oronasal masks needed a median pressure of 12 cmH₂O versus 10 for nasal masks and 11 for nasal pillows. The extra coverage can also cause more skin irritation, leave marks on the face, and feel restrictive for people who are sensitive to having their face covered. They’re harder to get a good seal with if you have facial hair, since the larger cushion has more surface area where a beard can create gaps.
One important detail: full face masks can sometimes push the jaw slightly backward, which may narrow the airway and partially counteract the pressure that’s supposed to keep it open. For this reason, sleep specialists typically recommend trying a nasal mask first and switching to a full face mask only when mouth breathing is confirmed as the issue, not just assumed.
Hybrid Masks
Hybrid masks combine elements of nasal pillows and full face masks. They use nasal pillow inserts to deliver air through the nose while also including a separate mouth cushion. The key difference from a full face mask is that hybrids don’t seal over the bridge of the nose, so you get less facial coverage and a wider field of vision.
This design works well if you switch between nose and mouth breathing throughout the night, since both airways stay covered. It’s also a good middle ground for people who need mouth coverage but find traditional full face masks too bulky, especially side sleepers. The dual-cushion setup spreads air pressure across two contact points, which can reduce the intensity felt at either one. Hybrids suit back sleepers and side sleepers but may shift more easily in certain sleep positions because of the two separate seal points.
Oral Masks
Oral masks are the least common type. Made of silicone, they sit between the lips and teeth (resembling a butterfly shape) and deliver air exclusively through the mouth. They include a tongue guide that holds the tongue in position so it doesn’t block airflow from the CPAP machine.
These are a niche option, typically reserved for people who can’t use any nasal interface due to structural problems, severe congestion, or injury. Most sleep specialists don’t reach for oral masks as a first or second choice because breathing through the mouth alone doesn’t provide the same airway-splinting effect as nasal delivery. But for the small number of people who need them, they solve a problem no other mask type can.
How Your Breathing Habits Shape the Choice
Your breathing pattern during sleep is the single biggest factor in choosing a mask type. Despite what seems intuitive, research consistently shows that a nasal mask is usually the best starting option for most people, even those who think they breathe through their mouth. Mouth breathing during sleep is common among people with obstructive sleep apnea, but it’s sometimes caused by the nasal mask leak itself rather than a natural habit. Two distinct leak patterns occur with nasal masks: the mouth simply opening, and a more complex issue where the soft palate drops and creates back-pressure. Each has a different fix.
The general recommendation is to start with a nasal mask or nasal pillows, try them for at least a month, and switch to a full face or hybrid mask only if confirmed mouth breathing persists. Jumping straight to a full face mask can mean using higher pressures than necessary and potentially reducing how well the therapy works. When a switch from nasal to oronasal delivery is needed, pressure settings often need to be recalibrated upward to maintain the same therapeutic effect.
Fitting Considerations for Face Shape and Lifestyle
Beyond breathing style, a few practical factors narrow your options further. If you have a beard, nasal pillows or hybrid masks tend to seal better than full face masks because their contact area is smaller and mostly avoids the chin and cheeks where hair grows. Side sleepers do best with low-profile masks (nasal pillows and some hybrids) that won’t get pushed out of alignment when pressed into a pillow. Back sleepers have the most flexibility since any mask type can maintain its seal in that position.
People who feel anxious or claustrophobic wearing a mask over their face should start with nasal pillows, which leave most of the face uncovered. Full face masks are the most likely to trigger that feeling, though newer designs have reduced their bulk significantly compared to models from a decade ago.
For children, mask selection is more challenging. Pediatric faces vary widely in size, and the range of available masks doesn’t match that variation well. Masks designed for adults often don’t scale down effectively, and even “very small” sizes from some manufacturers run large for younger children. Pediatric masks may also place vent holes closer to the nose to help clear exhaled carbon dioxide more efficiently, since children move smaller volumes of air with each breath.
Cushion Materials
Most CPAP mask cushions are made from silicone, gel, or foam. Silicone is the most common and creates a reliable seal, but it can cause skin irritation or pressure marks with prolonged use. Gel cushions conform more closely to facial contours and distribute pressure more evenly, which helps if you get red marks or sore spots. Foam cushions (often memory foam) offer the softest feel and are sometimes preferred by people with sensitive skin, though they may wear out faster and need more frequent replacement.
Replacement Schedule
CPAP mask components wear out at different rates, and a deteriorating cushion is one of the most common causes of air leaks that people mistake for a poor mask fit. Medicare’s replacement guidelines give a useful baseline for how often each part typically needs swapping:
- Mask cushions and nasal pillows: every 2 weeks (2 per month)
- Mask frame or shell: every 3 months
- Headgear straps: every 6 months
These timelines reflect how quickly silicone loses its flexibility and seal integrity. You don’t necessarily need to replace parts this often if they’re still performing well, but if you notice increasing leaks, skin irritation, or visible wear on the cushion surface, it’s likely time. Washing your cushion daily with mild soap extends its life and keeps oils from your skin from breaking down the material prematurely.