ATF Premium 39H
Extra-firm high-density blue foam — engineered for sofa seat cushions.
- Density
- 38–40 kg/m³
- Hardness
- 180–220 N
Replacement foam. A familiar favourite.
Refill My Sofa Cushions
Keep the sofa you love.
Bring back its comfort.
Give flat, sagging cushions a new lease of life with replacement foam cut to fit your existing covers.
Your sofa. Your covers. A more comfortable inside.
Step-by-step cushion refill guideCut to your measurements
Made for your existing covers
Comfort, without a new sofa
From measuring to your first sit
Your cushion refill,
step by step
Keep your covers. Choose the right replacement inside. Enjoy your favourite seat again.
Get my cushion price01
Check your covers
Open the zip and check that the old filling comes out. Keep covers that are sound, with working seams and zips. For fixed upholstery or loose feather and fibre fillings, contact us before choosing a foam replacement.
02
Measure each cushion
Remove the filling and measure the empty cover between its sewn seams. Record width, front-to-back and the sewn border depth. A 4-inch border uses 5-inch foam with a full Dacron wrap; see the measuring guide below. Keep width and front-to-back measurements seam-to-seam, without an extra allowance.
03
Choose your shape and comfort
Enter your measurements in the cushion calculator. Compare foam hardness and intended use in the foam guide: density alone does not tell you how firm it feels. Choose a seating grade for seat cushions; back cushions may need a softer feel.
04
Choose your finishing touches
If offered for your chosen foam, Dacron rounds the cushion, helps fill out creases and protects the foam. Stockinette helps the insert slide into the cover. For our 4-inch border example, order 5-inch foam and choose Full Wrap under Dacron: 4-inch foam would look flat and wrinkled even with Dacron. Check your wrapping option and price before adding to your basket.
Compare cushion finishes in the ordering steps05
Review and order
Use quantity for identical cushions. Add cushions with different measurements or foam grades separately. Check each shape, measurement, unit, extra and quantity in your basket before entering your delivery details and paying.
06
Fit your new inserts
Unzip the cover fully. Gently compress the foam and guide it through the opening, easing the corners into place. Smooth the cover around the insert and close the zip gently. Never force a tight zip or pull hard on seams; contact us if the fit is not right.
Before & after
Sagging cushions, meet brand-new support
Same sofa, same covers — new foam inside. Drag the handle to see the difference a replacement insert makes.
BeforeAfter
The outside stays. The inside changes.
Give your favourite seat
a fresh start
The sofa that fits your room. The armchair you always choose. When the cushions lose their support, you do not have to say goodbye to the whole piece.
Replacement foam can restore a cushion’s shape and support, making better use of furniture you already own. We supply the inserts; you keep your covers and fit them at home.
Find my cushion foamMade to fit the way you sit
Replacement foam for your seating
A little firmer. A little softer. Yours.
Choose your comfort
Luxury Reflex Grey
High-resilience reflex foam — our most popular sofa grade.
- Density
- 40–42 kg/m³
- Hardness
- 130–160 N
ATF400 Luxury Reflex Pink
Premium soft reflex foam — ideal for sofa back cushions.
- Density
- 38–40 kg/m³
- Hardness
- 100–140 N
Density and firmness are different: compare the feel and intended use, not density alone. All existing grades remain available in the calculator.
Familiar furniture. Fresh support.
Replacement cushions for the sofa you own
Looking for DFS replacement cushions, IKEA sofa cushion inserts or replacement armchair foam? Start with your own cushion’s shape and measurements, not the brand name. We cut replacement foam for removable covers to the sizes you provide.
Your sofa brand
- DFS cushion replacement
- IKEA cushion replacement
- ScS cushion replacement
- Sofology cushion replacement
- Next cushion replacement
- John Lewis cushion replacement
- Marks & Spencer cushion replacement
- Furniture Village cushion replacement
- Habitat cushion replacement
- Dunelm cushion replacement
- Argos cushion replacement
- Harveys cushion replacement
- Oak Furnitureland cushion replacement
- Laura Ashley cushion replacement
- Duresta cushion replacement
- G Plan cushion replacement
- Parker Knoll cushion replacement
- Ercol cushion replacement
- Loaf cushion replacement
- Made.com cushion replacement
Your type of seating
Independent replacement foam, not original manufacturer parts. We are not affiliated with these brands. Brand names do not guarantee fit: check that your cushion filling is removable and measure each insert. For fixed upholstery, integrated recliners or loose feather/fibre fillings, ask for advice before ordering.
Measure the cover. Restore the comfort.
How to measure your cushion covers
A tape measure, an empty cover and a few careful checks. Start with the sewn seams—not the shape of your tired filling.
- 01
Empty the cover
Unzip your cushion and remove the filling. Lay the empty cover on a flat surface. Smooth out creases gently, without pulling or stretching the fabric. Measure the cover, not the sunken old foam.
- 02
Measure the width
Measure across the seat panel from one sewn side seam to the opposite seam. Keep the tape straight. Do not include loose piping, tabs or seam allowances.
- 03
Measure front to back
Measure from the front sewn seam to the back sewn seam. For a tapered cushion, also measure the back width. Match any curves, cut-outs or wings to the lettered shape diagram.
- 04
Measure the border depth
The border is the vertical strip of fabric around the cushion. Hold this strip flat and measure from its top sewn seam to its bottom sewn seam—not around the piping or across the seat panel.
- 05
Choose foam thickness and wrapping
Use our boxed-cushion example below for a plump seat. Enter the foam thickness you intend to order, then select Full Wrap under Dacron. Do not add an extra allowance to the width or front-to-back measurements.
- 06
Check each cushion separately
Write down every measurement and use one unit throughout. Do not assume neighbouring cushions are identical. For unusual shapes, stretched covers or a different border depth, contact us for sizing advice or book a collection.
Record A, B, C using the lettered diagram. Enter your chosen foam thickness where the diagram shows thickness.
A plumper boxed seat cushion
4″ border → 5″ foam
4″
Cover border
Top seam to bottom seam
5″
Foam thickness
Plus a full Dacron wrap
For a cover with a 4-inch sewn border, order 5-inch foam and choose Full Wrap under Dacron. The 5 inches is the foam itself; the wrap is additional. Dacron rounds the edges, helps fill out creases and protects the foam. Using 4-inch foam would leave this cover flat and wrinkled even with Dacron. This is our boxed seat cushion example, not a sizing rule for every cushion shape.
See the cushion comparison in the ordering stepsDon’t trust your measuring?
Pack your covers up—we’ll do the hard work. Choose a collection date and book with a £100 deposit. We’ll measure your covers and provide a quote for the refill.
A few things you might be wondering
Your cushion questions, answered
Can I keep my existing cushion covers?
Yes. You are ordering replacement foam inserts, not new covers. Check that your covers are in good condition and have an opening large enough to remove the old filling and fit the new insert.
How should I measure my cushions?
Remove the filling and measure the empty cover between its sewn seams: width, front-to-back and the border depth. For a boxed seat cover with a 4-inch border, order 5-inch foam with a full Dacron wrap. Do not add an allowance to width or front-to-back. Use the measuring guide for the lettered dimensions; for other border depths or unusual shapes, ask us or book a cover collection.
Which foam should I choose for a sofa seat?
Premium 39H offers extra-firm support for sofa seats. Luxury Reflex Grey is a resilient alternative for sofa and lounge cushions. Reflex Pink is a softer option intended for back cushions. Compare the seating specifications in the foam guide.
What are Dacron and stockinette?
Dacron is a soft wadding layer that rounds the cushion, helps fill out creases and protects the foam. It is not a substitute for the right foam thickness: in our 4-inch border example, 4-inch foam looks flat and wrinkled even with Dacron; choose 5-inch foam with Full Wrap instead. The calculator offers top-only, top-and-bottom or full wrapping. Stockinette is a stretchy sleeve that makes fitting the foam into a cover easier. These extras are not available for GraviDry, because wrapping would restrict drainage. Available choices and charges are shown before you add to basket.
How do I fit my new inserts?
Unzip your cover fully and gently compress the insert as you guide it through the opening. Work the corners into position, smooth the fabric, then close the zip without forcing it. Stockinette can help the foam slide into place.
Can I order several cushions in different sizes?
Yes. Set the quantity for identical cushions. For different shapes, sizes or foam grades, add each configuration to your basket separately.
What about delivery and returns?
The existing foam lead time is 3–5 working days. Delivery charges and any available upgrades are shown at checkout for your address and basket. Foam is made to your measurements; please check the existing terms for made-to-measure returns and manufacturing tolerances before ordering.
Less evening plumping
Thinking of swapping feather cushions for foam?
Explore a more supportive seat, a rounded Dacron finish and what to check before reusing your feather cushion covers.
Read the feather-to-foam guideA comfortable next chapter