Fisher & Paykel FlexiFit 431 Full Face CPAP Mask

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Key Features:

  • FlexiFit Technology contours to the face for an enduring seal
  • Under Chin Fit holds the mouth closed
  • Advanced Air Diffuser directs air away for a quiet night's sleep
  • Quick-Release Headgear simplifies mask removal
  • Compatible with all CPAP and BiPAP machines except the AirMini
Product Details

FlexiFit 431 Full Face Mask by Fisher & Paykel

The Fisher & Paykel FlexiFit 431 Full Face CPAP Mask is a comfortable and effective alternative to nasal masks and chinstraps. Designed with FlexiFit technology, this mask adjusts to the unique contours of your face for a comfortable fit.The FlexiFit 431 features a unique under the chin fit to keep the mouth closed during therapy and a Quick-Release Headgear that makes it easy to remove the mask in the middle of the night.

FlexiFit Technology

The FlexiFit 431 full face silicone cushion is designed to contour to the shape of the face for a durable seal. The inner layer of the cushion stays in place while the outer membrane gently presses against the skin.

Glider Strap
The Glider Strap connects the two layers of CPAP cushions. This allows you to move your head without disturbing the position of the cushion, which in turn helps keep the seal.

Unique Under Chin Design
Unique to the FlexiFit 431 full face, Fisher & Paykel designed this mask to have an under-chin strap. The under-chin design offers increased stability by adding another point of contact under your chin. With contact points on your forehead, chin, and a strap that wraps around your head, Fisher & Paykel has created a CPAP mask that effectively "locks" into place.

Efficient Air Diffusion
Made with tiny and directional holes to diffuse air away from you and your partner, the Fisher & Paykel FlexiFit's diffusion system ensures that your CPAP therapy will be quiet and noninvasive. This full-face mask also has a great pressure range from 4-25cm H2O, which makes this mask great for those who have a CPAP machine set to higher pressure settings.

The crown strap-shaped headgear offers enhanced stability and works in concert with the under-chin design of the mask. Due to the easy-release headgear, this mask is a perfect option for those users who wake up often during the night. As it comes with quick-releasing straps that can be released in a single motion.


How many sizes are available for the FlexiFit 431?
The Fisher & Paykel FlexiFit 431 Full Face CPAP Mask is designed to fit most facial shapes and sizes. The mask comes with seals in three different sizes (small, medium, and large) to accommodate different facial features.

What machines are compatible with the FlexiFit 431?
The FlexiFit 431 is compatible with all CPAP and BiPAP machines with the exception of the ResMed AirMini Auto Travel CPAP.

Can I wear this without the chin attachment?
No, the chin attachment is not removable and is a vital part of the FlexiFit 431.

Technical Data
90 days against manufacturer defects
Tube Connection
Front of the face
Mask Type
Headgear Clips and Type
Headgear Size with Mask
Other Headgear Sizes Available
Other Headgear Styles Available
Fit Pack Available
Active Sleeper
Stomach Sleeper
Glasses Friendly
Reduces Claustrophobia
Specifically Designed For Women
Facial Hair
Cushion Interchangeable with Different Type
Fisher & Paykel
Extra Features
Pressure Range: 4-25 cm H2O
Item Includes
  • Frame
  • 3x Silicone Seals/Cushions: Small, Medium, and Large
  • Headgear
  • Glider Strap
Reviews (7)
3.9 out of 5 stars
5 star
4 star
3 star
2 star
1 star
5 of 5 Stars!
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Subject: I like it
This mask doesn’t seem to be very well known but I was looking for something of its design. In particular, I wanted to find a full face mask with a very large cushion in the idea that it would disperse the weight. This seemed to fit the bill and so I gave it a show. It’s been quite good and I don’t have any complaints about it to speak of.

Cushion. The cushion is very large, cradling around the chin and going up to the top of the nasal bridge, between your eyes. It’s not very sightly or convenient for line of sight, but I like it because it spreads the weight in a large area, particularly on the cheeks. I’ve been able to avoid any red lines while also having a very easy time breathing. The tube points straight down which isn’t my favorite but it doesn’t affect me much anyways.

Harness. The harness is pretty plain Jane, with two parallel bands on each side. It’s not particularly high-tech but it holds the mask on well and doesn’t cause any discomfort. The material could be a little more breathable but it’s not something that’s noticeably affecting my sleep.
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3 of 5 Stars!
Manny E
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My first night using this mask was ok, perhaps because I was too tired and not really noticed anything. On the second night, I noticed that the mask and headgear caused some sore on the bridge of my nose with some red marks and sore on the side of my face, and a little air leakage.

I found that if I adjust my upper and lower straps, then things will be ok. There will be no leakage, and no sore or red marks on the face. Tighten the straps just right then these problems will not be noticeable. An acquaintance suggested that I can also use the cushion one size smaller than the one I am using may also help reduce leakage problem. It helps. This is my first full face mask, so I can't compare it with other full face masks. For now, it's working for me now that I am getting used to it.
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5 of 5 Stars!
Brandy W
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Subject: Nice mask
Mask is on the larger side but it's very comfortable. Cushion has lots of surface area to spread out the pressure, so I don't wake up with any marks or lines on my face.

The headgear is a little cumbersome to get on and adjust, but once on it's very comfortable and supple. I've been able to get very good sleep with this mask.
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2 of 5 Stars!
lester M
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The mask is to big and I should have gotten a smaller one. Not your fault I should have gone with a smaller version or another mask that had a smaller version. I am waiting for the VA to send me another one that will be more comfortable to use.
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5 of 5 Stars!
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so far so good the adjustments are good the option to size is nice with a small medium and large seal makes it simple to figure out. the release is a big part of this cpap world and this release is easy to release and reconnect.
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2 of 5 Stars!
The R
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This device is too small for the size of my top of nose to under chin. Will not work for me.

I am so sorry this mask did not work for you, luckily you can exchange it with our Mask Assurance Policy!

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5 of 5 Stars!
Corazon L
(Verified Purchase)
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Muy buena inversión. Tan pronto necesité comprar otra la pedire
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Showing 1 to 7 (of 7 reviews)
Q&As (2)
Have a question on this item? Ask here and we will answer it in 12-24 hours, usually in a few business hours! Questions and answers will appear here after we answer. You may also have email notifications.
Does the attachment that goes across the bridge that is the connector brake? If so is it replaceable? How much if so.

Hello, I am sorry that piece you cannot replace. If that breaks you will need to replace the whole mask. Here is that link

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This mask does not have a magnet closure does it mine I have now does and it broke off and Im looking into buying a new mask and headgear that does not have a magnetic closure

This mask is secured with straps, hooks and velcro. It contains no magnets.

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Showing 1 to 2 (of 2 questions)