How to Wash a Duvet

Your duvet cover goes in the wash every week or two. The duvet inside it has been quietly getting on with things for rather longer.

Our 2026 UK Sleep Survey found that the average British adult has had their current duvet for four and a half years. Around one in seven have been sleeping under the same one for nine years or more. That’s a lot of nights. If you can’t remember when yours was last washed, consider this your nudge.

The good part is that washing one is usually more straightforward than people expect. The tricky part is everything around the wash itself. Whether the thing will even fit in your machine. What temperature it can take, which varies more than you’d think. And how on earth do you get something that thick properly dry again without it going musty on you?

Get those three right and the rest will look after itself.

Usually, yes. Most modern duvets are machine washable, including feather and down ones. Two things decide it. The first is what the care label says, which we’ll come to in a second. The second is whether your washing machine is big enough, because a duvet crammed into a drum with no room to move won’t get clean or rinse properly.

If either answer is no, head to the launderette. Their machines are built for exactly this.

We know. Nobody wants to be told to read the label. Please do it anyway, because this is the bit where general advice falls apart.

Across our own duvet range, most wash at 40°C. That covers the Silentnight Hotel Collection, the Dream Team Ultimate Washable, the TheraPur Cool and the Flaxby duck feather and down.

Then there’s the Home by TEMPUR Luxe Fibre Cooling duvet, which takes a gentle wash at up to 60°C with a mild non-bio detergent. Same shop, same shelf, twenty degrees between them.

So there isn’t one correct duvet temperature. There’s the one printed on your duvet, and that beats anything we or anyone else can tell you.

Forget capacity in kilos for a moment and do the squash test. Stuff the duvet into the drum and press it down. If you can still fit a hand comfortably on top, you’re fine. If it’s wedged in like a cork, it won’t wash properly.

A duvet needs room to tumble. Water has to get through the filling, and detergent has to rinse back out of it, and neither happens in a packed drum. You’ll end up with soap trapped in the fill, which is exactly how duvets go stiff and grey.

Big duvets are the usual culprits. If yours is a king or super king, the launderette is often the easier call.

Take the cover off and wash that separately on its usual cycle. Give the duvet a shake to redistribute the filling, then check the seams for splits. A small hole becomes a very large mess once the spin cycle gets going.

Load it into the drum in a rough spiral rather than a folded slab, so it settles evenly. Use less detergent than you think you need, because too much is harder to rinse out of a thick filling. Skip the fabric softener entirely, since it coats fibres and flattens the loft.

Wash as the label says. Then, and this is the step everyone skips, run a second rinse. It’s the single easiest way to avoid detergent residue.

Our Flaxby duck feather and down duvet washes at 40°C, like most synthetics.

What’s different is the drying. Wet down clumps into dense little pockets, and if those pockets don’t break up as they dry, they stay clumped, and your duvet develops permanent cold spots.

The fix is patience and a bit of agitation. Dry it slowly, take it out every half hour or so, and shake and pull the clumps apart with your hands. Tedious, admittedly, but a whole lot cheaper than a new duvet.

A duvet must be bone dry before it goes back on the bed. Any damp left in the middle of the filling will turn musty, and you won’t smell it until it’s too late.

Tumble drying on a low heat is the most reliable route if the label allows it. Chuck in a couple of clean tennis balls or dryer balls to help knock the filling back into shape as it goes. Expect several cycles rather than one. And keep checking the middle, not the corners.

Line drying works beautifully on a proper breezy day, less so on a damp one. Some duvets are built to speed this up, and the Dream Team Ultimate Washable has ultrasonically sealed seams and dries faster than a standard duvet, which takes some of the guesswork out.

For how often all this needs doing, we’ve covered how often you should wash your bedding in full, duvet included.

Washing doesn’t keep a duvet going forever, though. Duvets last around five years with regular care, and after that, the filling loses its loft no matter how carefully you treat it. Thin patches, stubborn lumps and that flat, lifeless feeling are all signs the wash isn’t the problem.

Given that the average British duvet is already four and a half years old, plenty of us are closer to that point than we’d like to admit. Our duvets come in all-season, spring, summer, autumn and winter weights, and the duvet buying guide explains which tog suits what.

One thing worth knowing if you have allergies: Allergy UK advises that washing at 60°C or above kills dust mites, and that lower temperatures rinse the allergen away temporarily while the mites themselves survive. Since most duvets wash at 40°C, never push past the label to chase a hotter wash. Use hypoallergenic bedding and barrier covers instead.