A waterproof jacket is built to protect you from rain, wind and harsh conditions. Over time, dirt, sweat and body oils clog the fabric and reduce its performance. Washing it properly restores breathability and helps the waterproof treatment work as intended.
This guide explains how to wash, reproof and care for your waterproof shell correctly.
How a waterproof jacket works
Most technical shells use:
-
A face fabric:
the durable outer layer. -
A waterproof membrane:
such as ePTFE or PU, which blocks water from entering. -
A DWR finish:
Durable Water Repellent treatment applied to the outer surface to make water bead and roll off.
When the outer fabric becomes saturated, known as “wetting out,” breathability drops. The jacket may feel damp inside even though the membrane is still waterproof. Regular cleaning prevents this.
When should you wash a waterproof jacket?
Wash your jacket when:
- Water stops beading and begins to soak into the outer fabric
- The jacket feels clammy during use
- There is visible dirt or staining
- After extended use in sweat-heavy activities
As a general guide, active users may wash a shell every 10 to 15 wears.
Before washing
- Close all zips
- Fasten Velcro tabs
- Loosen drawcords
- Empty all pockets
- Brush off excess mud or debris
- Check the care label
How to wash a waterproof jacket
Use the correct detergent |
Machine washing instructions |
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Do not use:
These can damage the membrane or strip the DWR finish. |
Avoid overloading the machine. Consider washing the jacket on its own. |
Reproofing: restoring water repellency
If water no longer beads after washing, it is time to reproof.
There are two main types of reproofing:
Spray-on treatment |
Wash-in treatment |
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Always follow the product instructions carefully.
Heat activation
Many DWR treatments require gentle heat to reactivate.
After washing or reproofing:
- Tumble dry on low heat for 20 to 30 minutes, if permitted by the care label
- Or iron on low heat with a cloth between the iron and fabric
Heat helps the water-repellent finish bond evenly to the surface.
What not to do
- Do not dry clean unless the care label specifically states it
- Do not use high heat
- Do not use fabric conditioner
- Do not store damp
Improper care can permanently reduce waterproof performance.
Storage
Store your jacket:
- Clean and fully dry
- Hung loosely in a well-ventilated space
- Away from direct heat sources
Avoid compressing for long periods unless necessary for travel.
Why proper care matters
A well-maintained waterproof jacket:
- Breathes better
- Lasts longer
- Performs reliably in harsh conditions
- Reduces the need for premature replacement
Caring for your shell is part of extending its lifespan and reducing overall environmental impact.
