How to Clean and Re-Waterproof Your Hiking Rain Jacket
A waterproof hiking jacket is one of your most important allies on the trail. It protects you from rain, wind, and cold — but to maintain its performance, it needs proper care. In this guide, you’ll learn how to clean, maintain, and restore the waterproofing of your rain jacket to keep it in top condition.
🔶 What Is DWR Coating and Why It Matters
DWR (Durable Water Repellent) is a coating that makes water bead and roll off the fabric instead of soaking in. Without it, your jacket can get wet and lose both breathability and protection.
Do the water test:
• Lay your jacket flat
• Spray water on the surface
• If water beads up, the DWR is still effective
• If the fabric absorbs water, it's time to clean and re-proof
🔶 Waterproof Ratings Explained (5,000mm, 10,000mm)
• 5,000mm – Basic protection from light rain
• 10,000mm+ – Ideal for harsh weather and snow
The higher the number, the better the water resistance.
Dirt, body oils, and lotions degrade both the waterproof membrane and the DWR coating. A dirty jacket won’t breathe properly and may leave you wet from both inside and out.
🔶 How to Wash Your Rain Jacket in the Washing Machine
- Close all zippers and pockets
- Remove surface dirt with a sponge
- Clean the detergent drawer and drum
- Use 100–150ml of special cleaner (no regular detergent)
- Follow care label settings (temperature, cycle)
- Wash no more than 2 items at a time
🔶 Hand Washing – For Delicate Items
- Soak the jacket in lukewarm water
- Add a technical cleaner
- Gently rub stains and rinse with cold water
🔶 How to Dry Your Waterproof Jacket
• Air Dry: In a shaded, well-ventilated area
• Tumble Dry: If allowed, use a low-medium heat setting — it helps reactivate the DWR
🔶 How to Reapply DWR Coating
✅ Wash-In Method
• Add DWR liquid to your washing machine
• Best for full garment coverage
✅ Spray-On Method
• Ideal for insulated or fleece-lined jackets
• Spray evenly on the outer shell, focusing on high-friction areas (shoulders, sleeves)
💧 After application, dry the jacket and retest. If water beads again, the treatment was successful.
🔶 Where to Find DWR Products
Look for quality brands at outdoor gear shops:
• Nikwax
• Granger’s
These may cost more, but they greatly extend your gear’s lifespan.
🔶 Pro Option: Professional Cleaning Services
Specialized dry cleaners now offer services for technical outdoor clothing and DWR-treated jackets.
🟢 Conclusion: A Dry Hiker Is a Happy Hiker
A well-maintained waterproof jacket will:
✔ Breathe efficiently
✔ Keep you dry
✔ Stay lightweight
✔ Last for years
Invest a few minutes in proper care — and your jacket will keep protecting you through every adventure.
✍️ Written by George Koumpakis
