Wetting out
When a jacket's outer fabric soaks through and goes dark and heavy. The membrane may still be dry inside, but breathability stops.
Wetting out is a DWR failure, not a waterproofing failure. The face fabric absorbs water instead of shedding it, so the jacket gains weight, goes cold against your arms and stops passing vapor outward.
That last part is what makes it feel like a leak. With breathability blocked, your own sweat condenses on the inside of the membrane, and the resulting damp is indistinguishable from rain getting in.
The diagnosis is easy: if the outside is visibly soaked and dark, it is wetting out. If the outside is beading and you are still wet inside, the seams or the membrane have failed.
Dirt causes it as much as wear. Sunscreen, bug spray, fish slime and body oils all sit on the face fabric and attract water. Washing a jacket often restores it without any reproofing at all.
Treat wetting out as a maintenance signal, not a reason to replace the jacket. Wash, tumble dry low, reproof if needed.
Related terms
Where this comes up
The guides that use wetting out and show it on real gear.
Wetting out is one of 206 terms in the glossary.
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