Fisher & Paykel Eson 2 Nasal Mask

The Eson 2 from Fisher and Paykel is a nasal mask built around one problem: seals that hold when you fall asleep and leak by the time you wake up. Its RollFit cushion has a curved base that rolls on the bridge of your nose as you turn over.

Because the seal follows your movement instead of resisting it, the headgear does not have to be tight to keep contact. The ErgoFit headgear can also be set once and then stretched on over your head, like a hat, every single night after that.

Key Features:

• RollFit Seal: The curved cushion base rolls on your nose bridge as you change position rather than breaking contact.
• Pressure Assisted Sealing: Rising therapy pressure presses the silicone outward against your face, which seats the seal without extra strap tension.
• ErgoFit Headgear: Wear it the standard way by unclipping each night, or set the tension once and stretch it on.
• Universal Easy Frame: One frame fits every cushion size, so changing size means changing the cushion and nothing else.
• Washable Diffuser: The diffuser softens air leaving the mask and rinses clean, so venting stays quiet as it ages.
• Wide Pressure Range: The seal is supported across the full four to thirty centimeter therapy range without losing its shape.
• Three Sizes Plus Fit Pack: Small, Medium and Large sold individually, plus a Fit Pack that ships all three cushions together.

The Eson 2 suits patients who breathe through their nose and whose seal breaks up as they move at night. It is a strong choice if you have been tightening your headgear to chase leaks and paying for it in facial marks.

Compression seals against rolling seals

Most CPAP cushions work by compression. A flat silicone flange is held flat against the skin by strap tension, which works well while you lie still and poorly the moment the angle between mask and face changes.

A convex base behaves differently under the same movement. Having a curve to pivot on, it can rotate a few degrees around its contact point and stay in surface contact through a position change that would break a flat flange.

Why leaks get worse toward morning

Patients often report a mask that behaves for the first few hours and fails later. That pattern points at movement rather than fit, because a genuinely mis-sized cushion leaks from the first minute rather than waiting until three in the morning.

Turning from your back onto your side changes the angle at the nasal bridge. Whether a mask survives that depends on how its cushion answers angular change, and it is the single most useful thing to know when choosing between designs.

Setting tension once with StretchFit

Unclipping headgear each night means re-establishing tension each night, and small differences in that setting move the cushion to a slightly different spot on your face. Different spot, different seal, which is why some nights work and others do not.

StretchFit avoids the variable. You calibrate the straps a single time and afterward pull the assembly on whole, so the geometry that produced a good result the first night is reproduced without you touching an adjustment again.

Replacement intervals and what wears

Fisher and Paykel suggest a new cushion every one to three months, with headgear and frame on roughly a six month cycle. The silicone goes first because it carries the sealing load and absorbs facial oil every night.

Judge it by feel rather than the calendar. Silicone that has gone tacky or glassy has lost the surface that grips skin, and no amount of tightening restores it, so a worn cushion is replaced rather than compensated for.

Here's everything that comes in the box.

• RollFit seal cushion (Small, Medium or Large)
• ErgoFit headgear with StretchFit option
• Washable diffuser
• Easy Frame
• User guide