Key takeaways
- Reproofing restores the durable water repellent (DWR) finish on waterproof gear once it wears off.
- It makes water bead and run off the face fabric again instead of soaking in ('wetting out').
- It's done with wash-in or spray-on DWR products, usually activated with heat.
- It restores both water repellency AND breathability — key gear maintenance that extends a shell's life.
Re- + proof (as in 'waterproof').
What reproofing is
Reproofing is the process of restoring the durable water repellent (DWR) finish on a waterproof-breathable garment once the original treatment has worn off — so water once again beads up and runs off the face fabric instead of soaking in (‘wetting out’). Over time, dirt, oils, and abrasion degrade a shell’s DWR.
Why it restores breathability, not just water-shedding
When the DWR wears off and the face fabric wets out, that saturated outer layer blocks the garment from breathing — your sweat vapor can’t escape through the wet fabric, so you feel clammy and cold even though the membrane still keeps rain out. Restoring the DWR keeps the face fabric from saturating, so the garment breathes properly again.
Noticing their old shell now soaks through and feels clammy in the rain — water no longer beading — a hiker washes it with a tech wash, applies a wash-in DWR, and tumble-dries it warm. Water beads and rolls off again, and the jacket breathes like new.
How and when to do it
Signs you need it: water stops beading and the fabric looks dark and wet in the rain. To reproof: clean the garment first (use a tech wash, not regular detergent), apply a DWR treatment — wash-in (in the machine) or spray-on (targets high-wear areas) — then activate with gentle heat per the instructions. Doing it periodically keeps shells (including Gore-Tex) performing and extends their life.
The bottom line
Reproofing restores the DWR finish on a rain shell once it wears off, so water beads and sheds again instead of soaking in — and crucially, it restores breathability too, since a wetted-out face fabric can't let your sweat escape. Done with wash-in or spray-on DWR (usually heat-activated) after cleaning the garment, reproofing is key maintenance that keeps shells performing and extends their life.
Frequently asked questions
What is reproofing?
Reproofing is restoring the water-repellent finish — the durable water repellent, or DWR — on a waterproof-breathable jacket or other gear after the original treatment has worn off. Over time, dirt, oils, and abrasion degrade a shell's DWR, so water stops beading and instead soaks into the face fabric. Reproofing reapplies a DWR treatment so water beads and sheds again.
Why does reproofing matter for breathability, not just water?
Because when the DWR wears off and the face fabric 'wets out' (soaks up water), that saturated outer layer blocks the garment from breathing — water vapor (your sweat) can't escape through the wet fabric, so you feel clammy and cold even though the membrane itself is still keeping rain out. Restoring the DWR keeps the face fabric from saturating, which keeps the garment breathing properly. So reproofing fixes both the wetting-out and the clammy, non-breathing problem that comes with it.
How and when do you reproof gear?
First, signs you need to reproof: water no longer beads on the surface and the fabric looks dark and wet (wets out) in the rain. To reproof, you typically clean the garment first (a clean shell holds DWR better; use a tech wash, not regular detergent), then apply a DWR treatment — either wash-in (added in the washing machine) or spray-on (applied to the outside, good for targeting high-wear areas) — and then usually activate it with gentle heat (a tumble dry or warm iron with a cloth, per the product and garment instructions). Reproofing periodically as part of gear maintenance keeps shells performing and extends their life.
Sources
- Gear care & maintenance — The Mountaineers
- Fabric care — Gore-Tex