ResMed Nasal Cushion - AirFit N20

The AirFit N20 InfinitySeal Nasal Cushion is a replacement cushion built around unique "infinity" loops and variable thickness levels. These design elements help prevent air leakage, support the sides of the nose, and relieve pressure on the nasal bridge — all while adapting to your specific nose shape rather than forcing one shape to fit everyone.

Is This the Right Cushion for You?

This is the correct replacement part if you already wear an AirFit N20 or AirFit N20 for Her mask and need a fresh cushion, or want to try a different size for a better seal. Since all three sizes fit interchangeably on the same mask frame, you can experiment with sizing without buying a whole new mask.

Key Features at a Glance

• InfinitySeal design with "infinity" loops and variable thickness for a precise fit
• Helps prevent air leakage around the nose
• Provides support to the sides of the nose
• Relieves pressure on the nasal bridge
• Soft, frosted surface for a more natural feel against skin
• Maintains a secure seal even at high therapy pressure levels
• Compatible with any AirFit N20 or AirFit N20 for Her mask frame
• Available in three sizes: Small, Medium, Large

Why Choose the AirFit N20 InfinitySeal Cushion

Adapts to Your Nose Shape, Not Just Your Size

The InfinitySeal design uses variable thickness levels rather than a single uniform cushion shape, which lets it adapt more precisely around your individual nose contours — helping close small gaps that a simpler, single-thickness cushion might miss.

A Secure Seal at Higher Pressures

If your prescribed pressure is on the higher end, seal integrity matters even more, since leaks tend to get worse as pressure increases. This cushion is designed to hold its seal even at high positive airway pressure levels.

A Softer Feel Against the Skin

The frosted surface is designed to feel more natural against your skin than a harder, glossier silicone finish — worth noting if you find some cushions feel stiff or tacky against your face.

How to Change Your AirFit N20 Cushion

1. Remove the mask from your face and detach the frame from the headgear if it's easier to work with off your head.
2. Locate the connection points where the cushion meets the mask frame.
3. Gently pull the old cushion away from the frame at the connection points until it releases.
4. Align the new cushion with the same connection points on the frame.
5. Press the cushion firmly into place until it clicks or seats securely on all sides.
6. Check the fit by putting the mask on and confirming there are no obvious leaks before your next use.

Sizing

The AirFit N20 cushion comes in three sizes — Small, Medium, and Large — each marked with a letter (S, M, or L) printed on the base of the cushion. All three sizes fit interchangeably on any AirFit N20 or AirFit N20 for Her mask frame, so if your current size isn't giving you a good seal, you can order a different size and swap it onto your existing frame.

Replacement Schedule

As a general guideline, replace this cushion every 1 to 3 months, or sooner if you notice reduced seal, visible wear, or discoloration. Regular use, cleaning frequency, and skin oils all affect how quickly a cushion wears out, so your actual timeline may vary.

Specifications

Complete Your AirFit N20 Setup

Need the full mask, not just the cushion? See the AirFit N20 Mask with Headgear or AirFit N20 for Her Mask with Headgear. If you need the frame and elbow along with a cushion, the AirFit N20 Mask Assembly Kit is a good option. Curious about the top-of-head design instead? See the AirFit N30 Cushion or AirFit N30i Cushion. See more from the brand on the ResMed brand page.

Frequently Asked Questions

How do I change my AirFit N20 cushion?

Detach the old cushion from the mask frame at its connection points, then align the new cushion and press it firmly into place until it seats securely. See the full steps above.

How do I know what size to order?

Match the size letter (S, M, or L) printed on the base of your current cushion. If your current size isn't sealing well, you can try a different size on the same frame.

How often should I replace this cushion?

Every 1 to 3 months as a general guideline, or sooner if you notice reduced seal, visible wear, or discoloration.

Will this cushion work with my AirFit N20 for Her mask?

Yes. This cushion is compatible with both the standard AirFit N20 and AirFit N20 for Her masks.

Does this cushion hold a seal at high pressure settings?

Yes, the InfinitySeal design is built to maintain a secure seal even at high positive airway pressure levels.

Do I need a prescription to buy a replacement cushion?

No. The AirFit N20 nasal cushion can be ordered without a prescription. A prescription is only needed for the full mask and CPAP machine.