A dirty down jacket is a cold down jacket: body oils and grime make the fill clump, and clumped down can't trap heat. The good news is that you can safely wash a down jacket at home with a machine, the right detergent, and patience during drying. Here is the full process, step by step.

Read the Care Label First

Every jacket is different — shell fabrics, trims, and coatings vary — so the sewn-in care label overrides any general advice, including this guide.

• If the label says machine wash cold on a gentle cycle, proceed as below.
• If it says hand wash only or professional cleaning only, follow it.
• Note any warnings about temperature, bleach, or tumble drying.

What You Need to Wash a Down Jacket

• A down-specific detergent. Regular detergent strips the natural oils that keep down lofty, and fabric softener coats the plumes. Both do lasting damage.
• A front-loading washing machine, or a top-loader without a center agitator — agitator posts can tear internal baffles.
• A dryer that runs reliably on low heat.
• Clean dryer balls, or two or three clean tennis balls, to break up clumps.
• A free afternoon. Drying takes far longer than you expect.

Washing, Step by Step

1. Empty every pocket, close all zippers and flaps, and turn the jacket inside out.
2. Spot-treat visible grime — collar, cuffs, hem — by gently working in a little of the down detergent with your fingers.
3. Wash cold or lukewarm on the gentlest cycle with the recommended dose of down-specific detergent. Wash the jacket alone.
4. Run an extra rinse cycle. Detergent residue left in the fill hurts loft as much as dirt does.
5. Press water out gently. Never wring or twist a soaked down jacket — wet down is fragile, and the water weight can rip baffles. Support it with both hands when you move it.

Drying Is Where Jackets Are Saved or Ruined

Straight out of the wash, the fill will look like miserable wet clumps. That's normal.

• Tumble dry on low heat with the dryer balls in. High heat can melt shell fabric and damage the fill.
• Expect two to three hours, sometimes more. Pause every 30 minutes, pull the jacket out, and gently break up clumps by hand.
• The jacket is done only when it feels fully lofted and evenly fluffy, with no cold, damp lumps hiding in the baffles.
• Air-drying alone is risky: down that stays damp for a day can mildew. If you must air-dry, use a warm, airy room and massage the clumps apart frequently.

How Often Should You Wash It?

Less often than a regular jacket, more often than never.

• Wash when the jacket looks dirty, smells, or has visibly lost loft — for regular use, roughly once or twice a season.
• Between washes, spot-clean the cuffs and collar and air the jacket out after sweaty days.
• Always wash before long-term storage; oils left in the fill degrade it over the months. Then store the jacket loose, never compressed.

FAQ

The down is clumpy after washing — is it ruined?

Almost never. Clumping means the fill is still damp inside. Keep tumble drying on low with dryer balls and break the clumps up by hand every half hour; the loft returns once it's fully dry.

Can I hand-wash instead?

Yes — use a tub of lukewarm water with down-specific detergent, press the jacket rather than scrubbing it, and rinse until the water runs clear. The hard part is unchanged: it still needs thorough low-heat tumble drying to recover its loft.

Can I use regular detergent or fabric softener?

No. Regular detergents strip the oils that keep down springy, and softener coats the plumes so they can't loft. A down-specific detergent is the one purchase this job genuinely requires.