Free US shipping on 2 cushions · 60-day home trial · up to 20% off 2+ cushions

Free US shipping on 2 cushions

MEMORY FOAM SEAT CUSHION · OPEN REAR U-CHANNEL

Space under your tailbone.
Support all around it.

Space under your tailbone.
Support all around it.

Space under your tailbone.
Support all around it.

Deep U-channel, open through the rear edge

Deep U-channel, open through the rear edge

Raised rear zones, lower front profile

Raised rear zones, lower front profile

60-day home trial · we pay return shipping

60-day home trial · we pay return shipping

4.6

· 25 customer reviews

2 cushions for $89.98 · $44.99 each · Free US shipping

Or 1 cushion for $49.99 + $5.95 US shipping

Order today · we ship within 1–2 business days
Order today · arrives we ship within 1–2 business days
Order today · arrives we ship within 1–2 business days
Woman working at her desk, sitting on the Memory Foam Seat Cushion on an office chair

Open at the back edge

60-day returns

60-day returns

Return shipping paid

Open rear channel

Open rear channel

Space beneath the tailbone

Made for broad seats

Made for broad seats

Compare it with your chair

What customers say

4.6Based on 25 reviews

Cream top looks calm in the office

The cream face and gray edge look much less clinical than the black cushions I considered. The deep rear opening is also exactly as shown in the product photos.

Maya Q.

Photographs set the right expectation

The cushion I received has the same cream upper area, gray side wall and lowered front profile shown online. I appreciated that the page did not invent measurements.

Eglė M.

The U opening stays genuinely open

The rear channel runs all the way through the back edge rather than ending as a small hole. That was the design detail I wanted and it is easy to see in person.

Derek P.

Delivery updates were easy to follow

The dispatch estimate was not overly specific, and tracking kept me informed as the parcel moved. It arrived inside the range shown at checkout with the cushion undamaged.

Tessa B.

A pronounced open-rear contour

This is not a nearly flat chair pad. The raised rear sections and open U shape are quite pronounced, which suited my broad desk chair but may not suit every seat.

Oliver J.

Measure a narrow chair first

It sits neatly on my wider home-office seat. On our narrow dining chair the footprint felt too generous, so the warning to compare the photographed shape is worth following.

Sanne de Vries

Good-looking chair update

My plain task chair looks more considered with the two-tone cushion on it. The contour is visible from the side, yet the color does not dominate the room.

Lucy W.

Useful shape, sparse specifications

I like the broad sculpted surface, but I would still prefer published dimensions and care instructions before buying. The product page is honest about those details being unavailable.

Jonas K.

The problem with flat seats

Your chair meets you everywhere. Including your tailbone.

More padding doesn't change where you make contact. Shape does.

Woman perched on the front edge of a hard wooden chair, hand on her lower backThe problem

A flat seat has nowhere to give.

Sound familiar?

  • You perch on the front edge to keep weight off the back
  • You shift from hip to hip by mid-afternoon
  • Hard kitchen and office chairs feel worse as the day goes on
  • A folded towel or a pillow is your current fix

A thicker pad or a folded towel still puts padding right under the same spot.

Top-down view of the seat cushion with its open rear U-channelThe fix

An opening right where your tailbone sits.

  1. Open rear U-channelLeaves space beneath the tailbone area instead of adding more padding.
  2. Raised rear zonesFrame the opening and carry contact around it.
  3. Lower, scalloped frontSits lower under your thighs.
Same chair, with and without the cushion

Change the seat, not the chair.

Change the seat, not the chair.

With the cushion: the same chair with the Memory Foam Seat CushionChair alone: sitting straight on the flat chair seatChair aloneWith the cushion
What changes
  1. Without the cushion: Perching forward to keep weight off the backWith the cushion: Sit all the way backThe open channel sits under the tailbone area, so you can use the whole seat.
  2. Without the cushion: Folded towels and pillows that flatten and slideWith the cushion: A shape made for sittingMemory foam that comes back to shape after you stand up.
  3. Without the cushion: Hard kitchen and dining chairsWith the cushion: Take it from chair to chairOne piece, easy to carry to any broad, stable seat.
  4. Without the cushion: Shopping for a whole new chairWith the cushion: Works on the chair you ownFrom $49.99, with a 60-day home trial.
Free US shipping on 2 cushions · 60-day home trialNot sure it fits your chair? Check the fit →

ONE CUSHION. SHAPED AROUND THE TAILBONE.

Space where you want it. Support around it.

Space where you want it. Support around it.

Space where you want it. Support around it.

Memory Foam Seat Cushion with its open rear U-channel on a navy background
1Open rear channelSpace beneath the tailboneA deep U-shaped channel stays open through the rear edge, so the area under your tailbone sits over an opening instead of another padded layer.Open through the back edgeCentredFaces the backrest
2Sculpted surfaceSupport around the openingRaised rear zones frame the channel, and a broad surface with a shallow basin and a lower front profile carries your seated contact.Raised rear zonesShallow basinLower front
See the cushion and pricesOne cushion · From $49.99 · Free US shipping on 2 · 60-day home trial
See it in action

From the first press to the first sit

YOUR WORKDAY

A workday on the cushion.

A workday on the cushion.

A workday on the cushion.

Same desk, same chair. One cushion from the first coffee to the last email, and easy to take with you.

Same desk, same chair. One cushion from the first coffee to the last email, and easy to take with you.

Man starting work at his home-office desk, sitting on the seat cushion

09:00

Line it up once.

Line it up once.

Put the open channel at the back of the seat, sit down and start. It is shaped so your tailbone area sits over the opening, not on a flat pad.

Put the open channel at the back of the seat, sit down and start. It is shaped so your tailbone area sits over the opening, not on a flat pad.

Woman stretching beside her desk chair, with the seat cushion resting on the seat

13:00

Stand up, sit back down.

Stand up, sit back down.

Take your movement breaks. When you sit back down, check the channel is still at the back and carry on.

Take your movement breaks. When you sit back down, check the channel is still at the back and carry on.

Man carrying the seat cushion to a dining chair in the evening

17:00

Take it where you sit.

Take it where you sit.

One piece, easy to carry. Move it to a broad dining chair in the evening, or get a second cushion for the office.

One piece, easy to carry. Move it to a broad dining chair in the evening, or get a second cushion for the office.

COMPARE YOUR OPTIONS

How the cushion compares.

How the cushion compares.

How the cushion compares.

Memory Foam Seat Cushion

Open U-channel at the rear

Sculpted surface, not a flat pad

Raised zones either side

Keeps your current chair

60-day trial, free returns

$49.99 per cushion

vs a flat chair pad

Padding right under the tailbone

Flat surface, no channel

vs a donut ring cushion

Hole closed all the way round

No opening at the back edge

vs a new office chair

Replaces the chair you own

Seat shape depends on the model

Costs a whole new chair

AT A GLANCE

What you add

Under the tailbone

Seat surface

Rear edge

Keeps your current chair

Home trial

Price

Memory Foam Seat Cushion

OPEN REAR CHANNEL

Ergola cushion

An opening

Sculpted, shallow basin

Open U-channel

Yes

60 days, free returns

$49.99

Flat chair pad

FLAT FOAM

Flat chair pad

Padding

Flat

Closed

Yes

Depends on seller

Varies

Donut cushion

CLOSED RING

Donut cushion

A closed hole

Raised ring

Closed all round

Yes

Depends on seller

Varies

New office chair

REPLACE THE WHOLE CHAIR

New chair

Depends on the seat

Depends on the model

Usually closed

Replaces it

Depends on seller

A whole new chair

Other options vary by brand and model.

IS IT RIGHT FOR YOU?

Made for broad, stable chair seats.

Made for broad, stable chair seats.

Made for broad, stable chair seats.

An honest check before you order, so the cushion ends up on the right chair.

An honest check before you order, so the cushion ends up on the right chair.

Great fit if

Great fit if

The cushion will suit you well

Flat, hard seats bother your tailbone area

Flat, hard seats bother your tailbone area

You want to keep the chair you already own

You want to keep the chair you already own

Your chair seat is broad, flat and stable

Your chair seat is broad, flat and stable

You want to try it at home before deciding

You want to try it at home before deciding

Not the best fit if

Not the best fit if

Check these before you order

Your chair seat is narrow, small or deeply bucketed

Your chair seat is narrow, small or deeply bucketed

You need back support: it is a seat cushion, not a backrest

You need back support: it is a seat cushion, not a backrest

You need treatment for sciatica or a coccyx injury (talk to a professional first)

You need treatment for sciatica or a coccyx injury (talk to a professional first)

The seat cushion next to the plain mailer bag it ships in

WHAT’S IN THE BAG

One cushion, ready to use.

One cushion, ready to use.

1 × Memory Foam Seat Cushion

Open channel goes at the back

Cream top · grey side wall

The same finish as in the photos

Ordering 2 or 3? Each cushion is the same design.

Read the user guide

REVIEWS

What customers say after a few weeks.

What customers say after a few weeks.

Ratings and reviews from customers, shown in full.

Ratings and reviews from customers, shown in full.

4.6

4.6

Based on 25 reviews

Verified buyer badges

Verified buyer badges

Shown on reviews linked to an order

Shown on reviews linked to an order

60 days to decide

60 days to decide

Return shipping paid if it is not right

Return shipping paid if it is not right

Maya Q.

United States

·

Cream top looks calm in the office

The cream face and gray edge look much less clinical than the black cushions I considered. The deep rear opening is also exactly as shown in the product photos.

Purchased: Memory Foam Seat Cushion

Oliver J.

United Kingdom

·

A pronounced open-rear contour

This is not a nearly flat chair pad. The raised rear sections and open U shape are quite pronounced, which suited my broad desk chair but may not suit every seat.

Purchased: Memory Foam Seat Cushion

Eglė M.

Lithuania

·

Photographs set the right expectation

The cushion I received has the same cream upper area, gray side wall and lowered front profile shown online. I appreciated that the page did not invent measurements.

Purchased: Memory Foam Seat Cushion

Maya Q.

United States

·

Cream top looks calm in the office

The cream face and gray edge look much less clinical than the black cushions I considered. The deep rear opening is also exactly as shown in the product photos.

Purchased: Memory Foam Seat Cushion

Oliver J.

United Kingdom

·

A pronounced open-rear contour

This is not a nearly flat chair pad. The raised rear sections and open U shape are quite pronounced, which suited my broad desk chair but may not suit every seat.

Purchased: Memory Foam Seat Cushion

Eglė M.

Lithuania

·

Photographs set the right expectation

The cushion I received has the same cream upper area, gray side wall and lowered front profile shown online. I appreciated that the page did not invent measurements.

Purchased: Memory Foam Seat Cushion

Sanne de Vries

Netherlands

·

Measure a narrow chair first

It sits neatly on my wider home-office seat. On our narrow dining chair the footprint felt too generous, so the warning to compare the photographed shape is worth following.

Purchased: Memory Foam Seat Cushion

Read all reviews

We publish positive and critical reviews alike.

Who’s behind Ergola

Who’s behind Ergola

Secure checkout

Secure checkout

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Real people answer

Real people answer

info@ergola.co · replies within one business day

info@ergola.co · replies within one business day

60-day trial · 1-year warranty

60-day trial · 1-year warranty

Return shipping paid if it is not right

Return shipping paid if it is not right

The practical questions, answered.

The practical questions, answered.

What are the dimensions?

Will it slide on mesh or leather?

Which way round does it go?

Can I remove and wash the cover?

Is it a medical device?

Will the foam go flat over time?

Can I check out as a guest?

What about a new-foam smell?

When should a US order arrive?

What if I need to return it?

Do you offer free shipping?

Which payment methods do you accept?

What does the 1-year warranty cover?

Can I use it in the car?

READY WHEN YOU ARE

Give your tailbone
some space.

Give your tailbone
some space.

Give your tailbone
some space.

One sculpted memory-foam cushion with an open rear U-channel. Two chairs? Get one for the desk and one for home, and save 10%. Try it for 60 days, with return shipping paid.

One sculpted memory-foam cushion with an open rear U-channel. Two chairs? Get one for the desk and one for home, and save 10%. Try it for 60 days, with return shipping paid.

$44.99

per cushion when you order 2 · $89.98 with free US shipping

per cushion when you order 2 · $89.98 with free US shipping

Order your cushion now

60-day returns

Ships in 1–2 business days

1-year warranty

Secure checkout

Order today · we ship within 1–2 business days
Order today · arrives we ship within 1–2 business days
Order today · arrives we ship within 1–2 business days

One cushion: $55.94 with US shipping, before tax. Two cushions: $89.98 with free US shipping, before tax.

One cushion: $55.94 with US shipping, before tax. Two cushions: $89.98 with free US shipping, before tax.

Two seat cushions, one on a home-office chair and one on a dining chair

2 cushions $89.98 · Free US shipping

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Comfort for the chair
you already own.

Comfort for the chair
you already own.

Comfort for the chair
you already own.

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