Last Updated on October 4, 2026 by Umar Farooq
Close every zip, turn each cover inside out, and wash them all together on cold or lukewarm, gentle cycle, with a mild detergent and no bleach or fabric softener. Do not tumble dry. Take each cover out while it is still slightly damp and pull it back onto its insert — the fabric stretches when damp and dries to the right shape. A cover that dries flat and crisp off the insert is the one that will not go back on.
Almost nobody searching for how to wash cushion covers has a cleaning problem. They have a fit problem waiting to happen. The cover is fabric and the insert is not, so anything that makes the cover smaller leaves you with a square foam block and a case that is now two sizes short of it.
The failure here is fit, not dirt
Dirt comes out of a cushion cover easily. It is a flat panel of woven fabric with nothing structural about it, and a cold gentle cycle will deal with almost anything short of oil.
What goes wrong is dimensional. A cotton or linen cover relaxes and draws in when it is washed warm or dried hot — the same mechanism explained in why do clothes shrink in the wash — while the foam or feather insert inside it does not change by a millimetre. A loss too small to see on a tape measure is enough to turn the last six inches of zip into a wrestling match, and there is no way back from it. You can re-hem a curtain. You cannot re-hem a cushion cover that has gone small on all four sides at once.
So every instruction below is really one instruction: keep the heat out of it.
Which fibre you have decides the rest
Check the label first, and if the label has gone, judge by feel. The University of Georgia Extension’s fibre table is the quickest honest reference: cotton and linen are both listed as absorbent, durable and “Susceptible to mildew and strong acids”, while rayon — common in cheap velvet-look covers — is “Weaker when wet” and “May shrink or stretch, unless treated” (understand your fibers).
- Cotton and cotton blends. Machine washable, and the main shrinkers. Cold water, low spin.
- Linen. Washable and strong, but it creases hard and the creases weaken it at the fold. How to wash linen covers the detail.
- Polyester and microfibre. The easy case. Dimensionally stable, so the fit risk is low; wash inside out to stop pilling on the show face.
- Velvet and chenille. Pile fabrics crush under pressure. Steam rather than wash wherever possible, and never spin them hard.
- Rayon and viscose. Weakest wet of anything on this list. Hand wash or do not wash.
- Leather and faux leather. Damp cloth only.
How to wash cushion covers so they still go back on
- Vacuum each cover before it comes off, with the upholstery brush. Crumbs and grit that go into the drum come back as abrasion marks on the show face.
- Zip every cover shut and turn it inside out. An open zip is a small metal saw running loose in a drum of soft fabric for an hour, and it finds the other covers before it finds anything else.
- Wash the whole set together on cold or lukewarm, gentle cycle, with a mild detergent and no bleach or softener. IKEA prints the same restriction on its own removable covers — “Machine wash warm, normal cycle. To be washed separately. Do not bleach. Do not tumble dry” (SÖDERHAMN cover, cotton and polyester).
- Use the lowest spin the cycle allows. A hard spin sets creases into pile fabric and strains the seams of anything tailored.
- Pull them out damp, not dry, and go straight to the next section.
Refit them while they are still damp
This is the step that separates a cover that goes back on from one that does not, and it costs nothing.
Damp fabric stretches. Dry fabric does not. So take each cover out of the machine while it is still cool and slightly wet, work it over its insert — corners first, then the zip — and let it finish drying in place. The insert acts as a drying frame and holds the panel at full size. Done this way, a cotton cover that would have come up noticeably tight after flat drying goes on with the same effort it always did.
It is damp, not soaking. A cover put back dripping wet will leave the foam inside it wet for two days, and a damp foam insert in a warm room is how a sofa starts to smell.
The insert is a separate decision, and usually the answer is no
The cover is washable. The insert mostly is not, or at least not usefully. Foam blocks hold water in the middle long after the surface feels dry; feather and down inserts need a long, careful dry with agitation or they clump and sour. If the insert itself is the problem — smell, sweat, a spill that went all the way through — treat it as its own job, and the method in how to wash pillows is the closest comparable.
For ordinary refreshing, vacuum the insert, leave it somewhere airy for a few hours and put the clean cover back on. Nobody has ever been able to tell.
Outdoor covers play by a different rulebook
Outdoor cushion covers are usually solution-dyed acrylic rather than cotton, which changes the answers. Sunbrella’s own guidance for its upholstery fabrics: “Most Sunbrella upholstery fabrics are machine washable. To wash, first close any zippers. Machine wash in cold water on the delicate cycle with normal amounts of mild laundry detergent. For severe mold or mildew, add 1 cup of bleach. Always allow Sunbrella fabric to air dry” (how to clean Sunbrella upholstery fabrics).
Note what that permits and what it still forbids. A full cup of bleach is allowed on a fibre that is dyed before it is spun, which is why the colour survives it. Air drying is not negotiable even so.
FAQ
Can you put cushion covers in the washing machine?
Most cotton, linen, polyester and outdoor acrylic covers, yes — cold, gentle, zips closed, inside out. Velvet, rayon, silk and anything leather should not go in. The label decides, and an unlabelled cover should be treated as the most fragile thing it could be.
Do cushion covers shrink when washed?
Cotton, linen and viscose ones can, and heat is what causes it. Washing cold and skipping the dryer removes most of the risk; refitting the cover damp removes the rest.
Can cushion covers go in the tumble dryer?
No, and this is the single most common way they are ruined. IKEA prints “Do not tumble dry” on its own covers and Sunbrella says to always air dry. Twenty minutes of heat undoes a cover that survived the wash perfectly well.
What temperature should cushion covers be washed at?
Cold or lukewarm. Warm water buys very little on a panel of fabric that has only dust and body oils on it, and it is the difference between a cover that fits and one that nearly fits.
Should you wash all the cushion covers at once?
Yes, as a set. Any colour loss and any shrinkage happens to all of them equally, so they stay matched. Wash one cushion out of a set of four and you will see exactly which one you washed.
Wash the set, dry it slowly, put it back damp
Three things decide whether this goes well, and none of them is detergent. Cold water, no dryer, and the cover back on its insert before it finishes drying.
