| What it is | Restoring the DWR finish |
| When | When water stops beading / fabric wets out |
| Steps | Clean → reactivate with heat → reapply DWR |
| Why | Keeps the shell breathable |
Reproofing is restoring the Durable Water Repellent (DWR) finish on a waterproof-breathable garment so water beads and rolls off again instead of soaking in. Because DWR wears off with use and washing, periodic reproofing — cleaning, reactivating with heat, and applying a new wash-in or spray-on treatment — keeps a shell breathing properly and looking dry.
Why bother
It revives the DWR that protects breathability on shells like Gore-Tex; modern treatments are PFAS-free.
Frequently asked questions
What is reproofing?
Reproofing is renewing the water-repellent (DWR) treatment on the outer fabric of a rain shell or other waterproof-breathable gear. Over time the original DWR wears away and water starts soaking into the face fabric; reproofing reapplies a repellent finish so water beads and rolls off again.
When should you reproof a jacket?
When water stops beading on the surface and the fabric darkens as it 'wets out,' especially if the jacket feels clammy despite not leaking. First try washing and reactivating the existing DWR with heat; if water still doesn't bead, it's time to apply a new DWR treatment.
How do you reproof gear?
Clean the garment to remove dirt and oils (which kill DWR), then apply a wash-in or spray-on DWR product per its instructions — spray-on lets you treat only the outer face. Finish by activating it with gentle heat, such as a low tumble dry or warm iron through a cloth, per the care label. PFAS-free DWR products are now widely available.
Sources
- Reviving DWR — W. L. Gore & Associates
- Gear maintenance — The Mountaineers