How to Wash a Down Jacket (Step by Step)
A down jacket that has been washed incorrectly loses its loft — and with it, most of its warmth. The fix is straightforward once you know the right method. This guide covers machine washing, hand washing, drying, and how to rescue a jacket that has already clumped.
Why Washing Down Correctly Matters
Down insulation works by trapping air inside thousands of tiny clusters. Those clusters need room to expand — or "loft" — to create the air pockets that hold warmth. When down gets wet and clumps together, those air pockets collapse, and you lose insulation.
The two most common washing mistakes are using the wrong detergent (regular soap strips the oils from the clusters and causes permanent clumping) and not drying the jacket completely (damp down clumps, mildews, and smells). Both problems are preventable.
Done correctly, a machine wash actually restores loft by removing the body oils and dirt that compress down clusters over time.
What You Need Before You Start
- •Front-loading washer — no center agitator. Agitator machines twist the jacket, tearing the baffles that contain the down.
- •Down-specific detergent — Nikwax Down Wash Direct or Granger's Down Wash. These clean without stripping the natural oils from down clusters.
- •2–3 clean tennis balls or dryer balls — they beat the jacket during drying to break up clumps and restore loft.
- •Tumble dryer — air drying alone takes too long and risks mildew. A dryer on low heat is essential.
Step-by-Step Machine Wash Method
- 1
Check pockets and close all zippers
Empty every pocket. Zip up the main zip, chest pocket, and any pit zips. Fasten velcro cuffs if present — velcro can snag and damage the shell fabric.
- 2
Add down detergent — no regular detergent or softener
Use the amount specified on the detergent bottle. Do not add fabric softener under any circumstances — it coats down clusters and prevents them from lofting.
- 3
Run gentle or delicate cycle at 30°C (86°F)
Select the gentlest cycle available. 30°C is warm enough to clean effectively without damaging the shell fabric or the DWR (Durable Water Repellent) coating.
- 4
Run an extra rinse cycle
Detergent residue is the main cause of post-wash clumping. An extra rinse removes any remaining soap from the clusters.
- 5
Tumble dry on low heat with 2–3 tennis balls
Place the jacket in the dryer with the tennis balls. Set to low heat. The balls beat the jacket and break apart wet clumps as it dries.
- 6
Pause every 20–30 minutes to break up clumps by hand
Take the jacket out, shake it, and gently massage any lumpy areas between your fingers. This manually separates clusters the balls have not yet reached.
- 7
Dry completely — plan for 2–3 hours total
The jacket must be completely dry before you store it. Even a small amount of residual moisture will cause the down to mildew. When in doubt, run one more 20-minute cycle.
Hand Wash Method (If You Don't Have a Front-Loader)
If you only have access to a top-loading agitator machine or a laundromat with uncertain equipment, hand washing is a safer option.
- 1
Fill a clean bathtub with lukewarm water (around 30°C) and add the recommended amount of down-specific detergent.
- 2
Submerge the jacket and gently press it down to saturate the fill. Use gentle pressing and kneading motions — never twist or wring the jacket.
- 3
Drain the tub, refill with clean water, and repeat the pressing/rinsing process 2–3 times until the water runs clear and no soap remains.
- 4
Critical: support the entire jacket when lifting from the tub. A wet down jacket is very heavy. Lifting it by one end will tear the baffles. Scoop it up from underneath with both hands and arms.
- 5
Transfer to the dryer on low heat with tennis balls. Hand washing still requires tumble drying — the principle is identical to the machine-wash method.
How to Re-Loft Clumped Down
If your jacket came out of the wash in clumps, it just needs more drying time and mechanical action — the down itself is not permanently damaged.
- 1.
Return the jacket to the dryer on low heat with 2–3 tennis balls.
- 2.
Every 20 minutes, remove the jacket and massage the clumped sections firmly between your palms. You will feel the clusters separating.
- 3.
Shake the jacket vigorously to allow the freed clusters to redistribute through the baffles.
- 4.
Repeat until the jacket is fully lofted and completely dry. Stubborn clumps may take 3–4 cycles.
How Often Should You Wash a Down Jacket?
Most people wash down jackets too rarely, not too often. A useful guideline:
- •Active use: 1–2 times per season, or whenever the jacket looks dirty, smells of sweat, or feels less lofted than usual.
- •Casual use: Once per season before storing.
- •Before long-term storage: Always wash before putting the jacket away — stored dirt degrades down and shell fabrics over time.
Body oils are the main enemy of down loft. The more you sweat in a jacket, the more frequently it benefits from washing.
What NOT to Do
- ✗Fabric softener — coats down clusters and permanently reduces loft.
- ✗High heat drying — melts synthetic shell fabrics and damages DWR coatings.
- ✗Regular laundry detergent — strips natural oils from down clusters and causes clumping.
- ✗Agitator washing machines — the agitator twists the jacket and tears internal baffles, allowing down to migrate and cluster in uneven clumps.
- ✗Hanging to dry while wet — wet down clumps heavily under gravity and takes so long to dry that mildew develops. Always use a tumble dryer.
- ✗Dry cleaning — solvents damage down oils and DWR coating. Most manufacturer warranties are voided by dry cleaning.
After Washing: Re-Waterproofing (DWR Treatment)
Washing gradually strips the DWR (Durable Water Repellent) coating from your jacket's shell. After 3–5 washes, you may notice water soaking into the fabric rather than beading off. When that happens, it's time to re-apply a DWR treatment. See our full guide to re-waterproofing jackets.
Frequently Asked Questions
Can you put a down jacket in the washing machine?
Yes — but only in a front-loading machine with no center agitator. Agitator washers twist and tear the baffles that hold down clusters in place. Use the gentle or delicate cycle at 30°C and a down-specific detergent.
What detergent do you use to wash a down jacket?
Use a detergent formulated for down, such as Nikwax Down Wash Direct or Granger's Down Wash. Regular detergent and fabric softener strip the natural oils from down clusters and cause clumping.
How long does it take to dry a down jacket?
Typically 2–3 hours in a tumble dryer on low heat. You must break up clumps every 20–30 minutes and keep running until the jacket is completely dry. Damp down will mildew and smell.
Why is my down jacket clumping after washing?
Clumping means the down clusters bonded together from moisture and haven't been fully separated. Return the jacket to the dryer on low heat with 2–3 clean tennis balls and run for another 30–60 minutes, pausing to break up lumps by hand every 20 minutes.
Can I dry clean a down jacket?
No. Dry cleaning solvents damage the natural oils in down and degrade the shell fabric's DWR coating. Most down jacket manufacturers explicitly warn against dry cleaning. Machine or hand washing with a down-specific detergent is the correct approach.
How do I store a down jacket?
Store a clean, fully dry down jacket loosely in a large mesh or cotton bag — not compressed in its stuff sack. Long-term compression collapses down clusters and reduces loft permanently. A breathable storage bag keeps the jacket dry and allows the down to retain its natural loft.
Jake Thornton
Jake is an outdoor gear writer and backpacking guide with over a decade of experience testing equipment in alpine and backcountry environments. He specializes in gear maintenance, insulation technology, and helping hikers get more life out of their kit.