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The Cushion Booster

Instant lift for flat seats and saggy backs. Available in four sizes or made to your measurements.

New from Sofa Cushion Refills

Revive flat cushions in minutes.

The Cushion Booster adds volume and density to the cushions you already have, instantly restoring comfort and support without replacing the whole insert.

  • Instant results. Restores height and firmness right away.
  • Low-cost alternative. Far less than replacing the entire cushion insert.
  • Easy to install. No sewing, no tools. Open the zipper and slide it in.
  • Easy to order. Pick a standard size or enter your own measurements.
Seat Boosters Back Boosters
Two sofa seat cushions side by side with a tape measure showing the lift a Seat Booster adds
Same sofa, same cover. The cushion on the right has a Seat Booster inside.

How it works

Three steps. No tools, no mess.

1

Unzip

Open the zipper on the back of your existing cushion cover.

2

Slide it in

Fold the booster in half, slide it through the opening, and flatten it out into the corners.

3

Zip and relax

Close the cover and enjoy the lift. For the flattest cushions, add a second booster.

For seat cushions

Seat Booster

Using our patented pyramidal fiber stacked foam technology, the Seat Booster rebuilds loft and firmness right where you need it. Even severely compressed cushions can be brought back to life. For the oldest, flattest ones, simply add a double booster for maximum lift.

Measure the width and depth of your seat cushion cover, then choose the size that fits. Between sizes? Order a custom booster below.

Seat Booster insert, top view Seat Booster insert, side view showing its thickness
Small
Fits seats 20 to 22 in wide, 22 to 26 in deep
$39.00each
Medium
Fits seats 24 to 26 in wide, 26 to 28 in deep
$49.00each
Large
Fits seats 26 to 28 in wide, 28 to 30 in deep
$59.00each
Extra Large
Fits seats 28 to 30 in wide, 30 to 32 in deep
$69.00each
Custom size
Enter your seat cushion width and depth in inches. Priced instantly, made 3 in thick to your measurements.
Width (in)
Depth (in)
Qty
Your price
$ -
Enter a width and depth to see your price.

For back cushions

Back Booster

Sagging back cushions are one of the most common problems with sofas. Over time the original insert compresses and loses loft, leaving you with a sunken, uncomfortable seat. The Back Booster is a self-contained, cartridge-style form filled with resilient, high-loft polyester fiber. Slip it into your existing back cushion cover to restore height, shape and support in minutes, without touching the original insert.

Measure the width of your back cushion cover and choose the size that fits. Need a specific width? Order a custom booster below.

Back Booster insert, a long cartridge-style form
Sofa back cushion restored with a Back Booster inside
Front view of a full, lifted back cushion
Small
Fits backs 22 to 24 in wide
$30.00each
Medium
Fits backs 24 to 26 in wide
$40.00each
Large
Fits backs 26 to 28 in wide
$50.00each
Extra Large
Fits backs 28 to 30 in wide
$60.00each
Custom size
Enter your back cushion width in inches. Priced instantly, made 8 in tall to your width.
Width (in)
Qty
Your price
$ -
Enter a width to see your price.

Cushions too far gone for a boost?

Design brand new foam inserts to your exact measurements with the Cushion Refill Calculator.

Start a Refill Order How to measure