Short answer: You can restore a worn-out DWR (durable water repellent) finish on a softshell jacket by washing it with a residue-free detergent, tumble-drying it on low to medium heat to reactivate the existing treatment, and, if water has stopped beading, applying a wash-in or spray-on DWR product and heating it again. Do this once or twice a season, or whenever water soaks in instead of beading up.
What is DWR and why does it stop working?
DWR is a thin chemical coating applied to the outside of a fabric so water forms beads and rolls off instead of soaking in. It is not a waterproof membrane. It simply keeps the face fabric from "wetting out," which is what makes a jacket feel heavy, cold and clammy. Softshells rely on DWR for light rain, drizzle, wet brush and morning dew; they are not a substitute for a hardshell in a sustained downpour.
The coating wears down for three common reasons: abrasion (backpack straps, seat belts, brush), contamination (body oils, dirt, sunscreen, bug spray, campfire smoke) and age. Dirt and oils are the biggest culprit, and they are the easiest to fix. Often a jacket that seems to have "lost" its DWR is just dirty.
How do you know if your jacket needs re-treating?
Run a simple water test. Sprinkle a few drops on the shoulder or chest of the clean, dry jacket.
- Drops bead up and roll off: the finish is working. Nothing to do.
- Drops bead up but the fabric darkens or soaks in after a minute: the finish is tired. Wash and heat-reactivate.
- Drops soak in immediately and the fabric looks dark and wet: the finish is gone. Wash, then re-apply a DWR product.
How do you wash a softshell jacket before re-treating it?
Always clean first. Applying new DWR over dirt locks the contamination in and wastes the product.
- Close all zippers and loosen any hook-and-loop closures so they don't snag the fabric.
- Empty the pockets and check the care label.
- Wash on a gentle or warm cycle with a small amount of liquid detergent, ideally a technical-fabric wash. Skip powders, which can leave residue.
- Do not use fabric softener or bleach. Softener coats fibers with a waxy film that attracts water and defeats DWR.
- Run an extra rinse to flush out detergent.
If you are washing quick-dry or UPF shirts at the same time, the same rules apply: no softener, gentle cycle, and low heat.
How do you reactivate DWR with heat?
Many DWR finishes revive with heat, because warmth helps the water-repellent molecules stand back up on the fabric surface. After washing, tumble-dry the jacket on low to medium heat for about 20 to 40 minutes. Always follow the garment's care label; if it says do not tumble dry, air-dry it instead and skip the heat step.
If you can't use a dryer, a warm iron on a low synthetic setting works for some fabrics, but only if the label allows ironing. Place a thin towel or pressing cloth between the iron and the jacket, and keep the iron moving. Never iron directly on a nylon or polyester shell without checking the label.
After heat treatment, repeat the water test. If drops bead again, you are done.
When should you apply a new DWR product?
If washing and heat don't bring the beading back, the original finish has worn out and needs replacing. There are two main kinds of consumer product:
| Type | Best for | Pros | Cons |
|---|---|---|---|
| Wash-in | Unlined, uninsulated jackets, applied in the washer | Even coverage, easy | Treats the lining too, which can slightly reduce wicking |
| Spray-on | Outer shell only, spot repairs on shoulders, hood and sleeves | Targeted, keeps the inside untouched | Easy to apply unevenly |
For a softshell, spray-on is usually the better choice because it keeps the interior fabric absorbent and breathable. Apply it to a clean, damp jacket, wipe off any excess, then heat it as the product instructions say. Many modern products are PFAS-free; check the label if that matters to you, as some older fluorocarbon-based treatments have been phased out.
How often should you re-treat a softshell?
There is no fixed schedule. A jacket worn daily on a jobsite or trail may need attention every few months, while one worn for weekend hikes might last a full year. A reasonable rule: do the water test at the start of fall and again mid-season, wash when the jacket is visibly dirty or starts to soak in, and re-apply DWR only when washing and heat no longer work.
Which mistakes ruin a DWR finish?
- Fabric softener or dryer sheets. The most common cause of failure.
- Washing too rarely. Body oils and grime break down the coating faster than rain does.
- Storing the jacket damp. Hang it to dry fully before it goes in the closet or a pack.
- Using too much detergent. Residue attracts water.
- Expecting DWR to do a hardshell's job. If you are in steady rain for hours, you need a rain shell, not a better coating.
Where do FREDD MARSHALL jackets fit in?
Our softshell jackets are built for the conditions where DWR matters: cool mornings, light rain, wind and brush. Because the face fabric is a tightly woven synthetic, it responds well to the wash-and-heat routine above. You can browse the current lineup, including softshells, tactical work shirts like the Combat-Heritage ($32.99) and cargo pants, at freddmarshall.com, with free U.S. shipping. Looking after the gear you already own is the cheapest performance upgrade there is.
Frequently asked questions
Is DWR the same as waterproof?
No. DWR is a surface treatment that makes water bead and roll off. A waterproof jacket has a membrane or coating that blocks water even under pressure. Softshells with DWR handle light rain and splashes, not extended downpours.
Can I wash a DWR jacket in a regular washing machine?
Yes, in most cases. Use a gentle cycle, a small amount of liquid detergent, no fabric softener, and an extra rinse. Always check the care label first.
Does the dryer ruin water-repellent jackets?
Usually the opposite. Low to medium heat often reactivates DWR. The exception is a jacket whose label says not to tumble dry, in which case you should air-dry it.
How can I tell if my jacket's water repellency has failed?
Sprinkle water on a clean, dry jacket. If drops soak in or darken the fabric instead of beading up, the finish needs a wash, heat treatment or a fresh DWR application.