How to Wash a Down Jacket (Without Ruining the Loft)

A down jacket that has gone flat, clumpy or lost its warmth is almost never finished. Nine times out of ten the down is fine and the jacket is simply dirty, and grime, body oils and old detergent are matting the fill and killing the loft. A proper wash brings it back. Wash it the wrong way, though, and you really can ruin it, which is why so many people are scared to put a good down jacket anywhere near a machine.

This guide covers the whole job safely: why down needs different care from everything else in the wash basket, the one product mistake that does the most damage, and the slow drying step that separates a jacket that comes out lofted and warm from one that comes out a clumpy mess. It applies to any down insulation, from a lightweight down or synthetic insulated jacket to a heavy expedition piece.

Why down needs special care

Down works by trapping air. Each cluster is a three-dimensional puff of fine filaments, and it is the loft, the way those clusters spring open and hold a thick layer of still air, that keeps you warm. Anything that flattens or mats the clusters destroys the insulation, because a flat jacket traps no air.

Two things wreck loft, and both are avoidable.

Detergent residue. Ordinary washing detergent is the biggest enemy of down. Standard detergents strip the natural oils from the feathers and leave behind residues that coat and weigh down the clusters, so the down loses its spring and starts to clump. Nikwax is explicit that household detergents compromise down and should not be used on it. Fabric softener is worse still.

Heat and neglect during drying. Wet down collapses into heavy, matted lumps. If it dries in that clumped state, or if you blast it on high heat, you get a jacket with cold, empty patches and dense sodden ones. The fill has to be broken up and separated as it dries, which is the whole point of the drying step further down this guide.

Get those two things right, use the correct wash and dry it slowly and patiently, and washing a down jacket is genuinely straightforward.

Before you start

Two minutes of prep saves a lot of grief.

• Read the care label first. It tells you the maximum wash temperature and whether tumble drying is allowed. Follow it. If the label forbids machine washing, do not force it.
• Brush off loose mud and dirt from the outside so it does not just redistribute in the wash.
• Spot-treat any greasy marks. Cuffs, collar and hem pick up body oils and sun cream. A dab of a stain remover made for outdoor kit, worked in before the wash, shifts them.
• Do up every zip, popper and Velcro tab. Open zips snag baffles and abrade the shell in the drum.
• Empty the pockets and turn them out.
• Clean the detergent drawer. Old detergent residue in the drawer will contaminate the wash and undo the point of using a down-safe cleaner. Wipe it out or run a quick empty rinse first.

Use a down-specific wash, never normal detergent

This is the single decision that determines whether your jacket survives.

Do not use ordinary laundry detergent, bio or non-bio, and never use fabric softener. Standard detergents are designed to strip oils and leave a residue, and on down that means stripped feathers, coated clusters and lost loft. They also leave water-attracting residue in the fabric, which is the opposite of what you want in an insulating layer.

Use a cleaner made for down instead. Nikwax Down Wash.Direct is formulated to lift dirt and body oils while protecting the down's natural qualities and its ability to loft, and it rinses out cleanly rather than leaving a coating behind. For most people the sensible buy is the Down Wash + Down Proof duo, which pairs the cleaner with a proofer in one box, so you can clean the jacket and, if it needs it, restore the water repellency in the same session.

Machine washing, step by step

A front-loading machine is best. Top-loaders with a central agitator can be rough on the baffles, so if that is all you have, a gentle hand wash in the bath is the safer route.

1. Wash one jacket at a time. Down is bulky when wet and needs room to move, and Nikwax advises washing a single garment per load. Overloading stops it rinsing and drying properly.
2. Add the down wash to the clean detergent drawer at the dose on the bottle. As a guide, Nikwax suggests around 100ml of Down Wash.Direct per jacket, but follow the label.
3. Run a gentle or delicate cycle at a cool temperature, within whatever the care label allows. Cool water and a gentle cycle protect both the shell fabric and the fill. No fabric softener, ever.
4. Add an extra rinse. Down holds soap stubbornly, and leftover cleaner will weigh the fill down. If your machine has a second rinse option, use it, or run a plain rinse cycle afterwards.
5. Spin the water out gently, then again. Several spins, starting slow and building up, pull out as much water as possible without stressing the wet baffles. The less water left in, the shorter and kinder the drying.

Lift the jacket out carefully and support its weight. A soaking down jacket is heavy, and picking it up by one cuff can drag on the wet baffles and internal stitching.

The drying step that saves the jacket

This is where down jackets are made or ruined. Do not rush it. Everything you did in the wash is undone if the down dries clumped.

Wet down collapses into dense, matted lumps, and it has to be broken up and separated as it dries so the clusters can spring open again.

• Tumble dry on low heat, if the care label allows it. Low is the operative word. High heat can scorch the shell and damage the down, so keep it gentle and give it time.
• Add clean tennis balls or wool dryer balls to the drum. Three or four is plenty. As they tumble they knock the wet clumps apart and keep the down moving, which is exactly what restores the loft. This is the trick that does the heavy lifting.
• Stop and break up the clumps by hand every twenty to thirty minutes. Take the jacket out, feel for dense lumps in the baffles, and gently pull and massage them apart. Then put it back in. Repeat until you cannot feel any lumps at all.
• Be patient. Drying down properly takes hours, not one cycle. Reckon on two to three hours for a light jacket and up to around five for a thick winter piece. It is done only when it is completely dry and lump-free, with no cold, damp, dense patches left.

If you cannot tumble dry, air drying works too, and modern proofers do not need heat to activate, but it is slower and you must break up the clumps by hand frequently throughout, laying the jacket flat and turning it, or it will dry matted.

Restoring the loft

By the time the jacket is bone dry and you have broken up the last of the clumps, most of the loft is already back. To finish it off, take the jacket out, give it a firm shake, and pat the baffles all over with flat hands to redistribute the fill evenly across every chamber.

Hold it up to the light. The down should look evenly spread, with no thin, see-through patches and no dense wads bunched in the corners. If you find an uneven baffle, work the fill along it with your fingers until it sits evenly.

A freshly washed and properly dried down jacket often lofts better than it did before the wash, because you have cleared out the oils and grime that were matting the fill. If yours still looks flat after a full, patient dry, the most common cause is that it was not dried long enough or hot clumps were left to set, so another gentle low-heat cycle with the balls, breaking up lumps as you go, usually finishes the job.

Wash, or wash and reproof?

Cleaning and reproofing are two different jobs, and not every wash needs both.

Washing removes the dirt and oils that flatten the down and restores the loft. That is the job most jackets need, and for a lot of jackets a clean is all it takes.

Reproofing restores the water repellency. Down is useless when wet, so most down jackets have a Durable Water Repellent (DWR) on the shell, and many use hydrophobic (water-treated) down inside. Both wear off with use. When the shell starts wetting out, soaking in and going dark rather than beading, or when the jacket feels like it wets through in drizzle it used to shrug off, it is time to reproof as well as clean. Nikwax Down Proof, the second bottle in the duo, adds water repellency to both the down fill and the outer fabric, and it goes on in a separate cycle straight after the clean, while the jacket is still in the machine.

So: clean every jacket that has gone flat or grubby. Add the Down Proof step when the shell has stopped shedding water. The mechanics of DWR, why a shell wets out and how a proofer renews it, are the same as on a rain jacket, and they are covered in full in the guide to reproofing a waterproof jacket.

How to store a down jacket

How you store down between wears matters as much as how you wash it.

• Store it loose, never compressed. This is the golden rule. Leaving down squashed in a stuff sack for weeks or months permanently damages the clusters and flattens the loft. Stuff sacks are for the trail, not the wardrobe.
• Hang it on a wide hanger, or keep it loose in a large breathable storage bag. The fill needs room to stay lofted. Somewhere cool, dry and out of direct sun is ideal.
• Store it clean and bone dry. Grime and body oils left in the fabric over a long store degrade the down and attract moisture, and any dampness invites mildew and that musty smell. Wash it before it goes away for the season.

A down jacket is the warm layer in a wider system, so it is worth checking the rest of your kit at the same time. If you are pulling everything out ahead of the colder months, the autumn and winter layering guide covers how the insulation works with what you wear over and under it, and the insulated jackets guides are the place to start if the wash reveals a jacket that is genuinely past its best.

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