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Zinsac Memory Foam Seat Cushion

Contoured memory foam seat · Built-in backrest · Fits directly on a compatible chair

Product details
  • One-piece memory foam cushion
  • Contoured seat with built-in backrest
  • Sets directly on your chair
  • Polyester fabric exterior
Secure checkout · Free standard shipping on eligible orders in the US, Canada, UK and Australia

Choose a color for each cushion. To change your pack or colors after opening checkout, return here and select them again.

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Three colors

Ergonomic

MemoryFoam

Contoured

Ergonomic

Contoured

MemoryFoam

Contoured

Ergonomic

Contoured

MemoryFoam

Contoured

Ergonomic

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Free Standard Shipping

Free standard shipping to eligible addresses in the US, Canada, the UK and Australia. Delivery estimates vary by destination.

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Returns & Support

See our return policy below for eligibility. If your item arrives damaged, defective or incorrect, contact us with your order number.

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Secure checkout

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Support Team

Get help with sizing, shipping or an existing order.

See the Cushion in Action

One-piece design

Seat and backrest together

See the shape up close

Watch the cushion in use

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Memory foam seat cushion on office chair

A closer look at the Zinsac cushion

See how the contoured seat and built-in backrest work together on the chair you already own.

A contoured seat

The shaped base adds a layer of memory foam to your chair.

Memory foam cushion providing ergonomic support

A built-in backrest

The raised backrest and seat are joined in one piece, so there is only one cushion to position.

Chair with upgraded memory foam cushion installed

Check the fit first

Measure the usable seat between the armrests. The cushion measures approximately 17.3 × 16.5 × 12.6 in (44 × 42 × 32 cm).

Person sitting comfortably at desk with cushion

How to Use Your Zinsac Cushion

01 · Measure

Check your seat width

Measure the usable seat between the armrests and compare with the 17.3 × 16.5 in footprint.

02 · Place

Set the cushion in place

Place the contoured base on your chair with the raised section against the chair back.

03 · Adjust

Check your seated fit

Sit down and check that your feet rest comfortably and you can reach your work surface.

Seat pad or seat and backrest?

Seat-only cushion

A seat pad adds cushioning beneath you and leaves the chair back as it is.

Zinsac one-piece cushion

The contoured seat and raised backrest are joined, so both go onto the chair together.

What to measure

Check the width between the armrests, the seat depth and the space against the chair back.

What is included

One memory foam cushion with a polyester exterior. Choose your color above.

Memory foam seat cushion with integrated backrest on office chair

Frequently Asked Questions

How does the Zinsac cushion improve chair comfort?
The Zinsac cushion fits most standard chairs and upgrades comfort instantly with its memory foam design.
What chair sizes are compatible with this cushion?
It’s designed to fit chairs with seat dimensions close to 17.3 x 16.5 inches for optimal support.
What materials are used in the Zinsac cushion?
The cushion is made from durable memory foam and polyester fabric for long-lasting use.
What is included with my Zinsac cushion order?
Your purchase includes one cushion, shipped securely in plastic packaging for protection.
How long does shipping take for the Zinsac cushion?
We offer reliable shipping with tracking to ensure your cushion arrives promptly and safely.