A down jacket keeps you warm with air, not with feathers. Each down cluster is a soft, three-dimensional ball that traps tiny pockets of air; the jacket's job is to hold as many of those clusters as possible, fully open. When down gets dirty, the clusters stick together and lose that open shape. A jacket that weighed 380 g and kept you warm at −10 °C in its first winter can feel thin by its third without losing a single gram.
The fix is a wash, done properly. Most people avoid it because they have heard it ruins down. It does not, but the wrong detergent, a hot cycle or an impatient dryer will. Here is how we wash the Doruk jackets and Ayaz bags that come back to the shop for service.
When to wash, and when not to
Down does not need washing often. Once a season is plenty for a jacket you wear hard; every two or three seasons for a sleeping bag used with a liner. Wash when you see these signs, not on a calendar:
- The baffles look flat even after you shake the jacket and leave it on a hanger overnight.
- The collar and cuffs are shiny or dark from skin oil and sunscreen.
- It smells of campfire, sweat or the inside of a car boot.
- Water no longer beads on the outer fabric, even after a rinse.
For a single mark, skip the full wash. A drop of down soap on a damp cloth, rubbed gently and rinsed, saves the loft a whole cycle.
The wash, step by step
Use a front-loading machine. A top loader with a central agitator can tear the inner baffles. If you only have one of those, wash by hand in a bathtub instead.
- Prepare. Empty every pocket, close all zips and Velcro, and loosen the drawcords. Turn the jacket inside out.
- Clean the machine. Run a short rinse with nothing in it to wash out traces of normal detergent and softener. Both strip the natural oils that keep down springy.
- Use a down-specific wash. Follow the dose on the bottle for one jacket. Never add softener or bleach.
- Gentle cycle at 30 °C. Wool or delicates programmes work well. Add an extra rinse if your machine allows it; soap left in the down keeps it clumped.
- Low spin. 400 to 800 rpm. A high spin compresses wet down into hard lumps that take hours to break up.
When the cycle ends, lift the jacket out with both arms, supporting the whole weight. Wet down is heavy, and pulling it out by one sleeve can strain the seams.
Drying is where the loft comes back
Out of the machine, your jacket will look like a sad, wet rag. That is normal. The loft returns in the dryer, slowly, and only if you let it take its time.
A down jacket is never as dry as it feels. When you think it is done, give it another hour.
Our repair bench rule
Tumble dry on the lowest heat, with two or three clean tennis balls or wool dryer balls. They knock the clusters apart as they dry. Every 30 minutes, take the jacket out, feel for clumps along each baffle, break them up with your fingers and shake it hard. A jacket takes two to three hours; a winter sleeping bag can take five.
| Item | Wet weight | Dry weight | Dryer time (low) |
|---|---|---|---|
| Doruk Down Jacket | 1,150 g | 380 g | 2½–3 h |
| Ayaz −9 bag | 3,400 g | 1,250 g | 4–5 h |
| Buzul −18 bag | 5,100 g | 1,980 g | 5–6 h |
That last column is our favourite trick: put the jacket on a kitchen scale. If it is still 30 or 40 g heavier than when it went in, the down is still damp inside, however dry the shell feels. Damp down stored in a stuff sack goes mouldy within days.
No dryer? Lay the jacket flat on a rack in a warm, airy room, out of direct sun, and turn it and break up the clumps every few hours. It takes two or three days, but it works.
After the wash: water repellency and storage
If water no longer beads on the outer fabric, refresh the water-repellent finish with a spray-on treatment for down garments while the jacket is still slightly damp, then finish drying as above. The heat of the dryer helps the treatment bond.
Store the jacket loose, on a wide hanger or in a large cotton bag, never in its stuff sack. A season compressed in a cupboard costs more loft than a season of use. Take the stuff sack only on the trail, where it belongs, and let the down breathe for the other ten months of the year.
1 comment
The kitchen scale trick is great. My jacket felt dry after two hours but was still 45 g over. Another hour and it came back fuller than I remembered.