Down loses loft when body oils and dirt clump the clusters together. A proper wash once a season brings it back — and it is easier than you think.
What you need
A front-loading washer (top-loaders with agitators can tear baffles), a down-specific wash, and three clean tennis balls.
The method
Zip everything, turn the jacket inside out, and run a gentle cycle with warm water and an extra rinse. Tumble dry on low with the tennis balls for 2–3 hours, checking every half hour and breaking up clumps by hand.
Torn a baffle? Bring it to our repair bench — a patch is $22 and usually done in five days.