Why Wet Walks Are Hard on Waterproofs

Every boggy traverse, every scramble through heather and every muddy descent leaves more than memories on your jacket. Waterproof clothing doesn't just repel rain — it spends the day absorbing everything the hills throw at it. Peat, grit and trail mud lodge in the weave of the fabric. Sweat, sunscreen and natural body oils soak into the shoulders and back panel. Over time these contaminants don't just look untidy: they clog the fabric and break down the durable water repellent finish, the DWR, that makes water bead and roll away.

When the DWR fails, the outer fabric "wets out". It becomes heavy, feels cold against the skin and, crucially, stops the breathable membrane working properly. Your jacket may still be waterproof in the sense that no rain gets through, but you'll finish the day clammy and chilled anyway. The good news is that most of this is reversible with a bit of routine care, and the routine takes far less time than you'd think.

Rinse the Mud Off Before You Put the Kettle On

The single most useful habit is a quick rinse as soon as you get home. Mud left to dry hardens, and brushing it off later abrades the fabric and forces dirt deeper into the weave.

• Hang the jacket or trousers up and rinse with lukewarm water from the tap or a low-pressure shower head.
• Use a soft nail brush or sponge on cuffs, hems, knees and the seat — the areas that pick up the most gunk.
• Never use washing-up liquid, bar soap or household detergent as a shortcut. They strip the DWR and leave residues that attract more dirt.
• Don't leave damp waterproofs bundled in the car boot or a rucksack. Mildew and delamination both love a warm, sealed bag.

If you've been out in heavy rain and nothing is actually dirty, a rinse and a drip dry is all that's needed. Save the full wash for when it's genuinely required.

Washing: Less Often, But Properly

Aim to wash a well-used waterproof every ten to fifteen outings, or sooner if it smells or looks grubby. Before it goes in the machine, empty every pocket, do up all zips, fasten Velcro cuffs, and loosen hood cords and hem drawcords so they don't tangle.

Use a liquid cleaner formulated for waterproof and breathable fabrics — powder and biological detergents are the enemy here. Fabric conditioner is worse still: it coats the fibres and actively destroys breathability. Wash at 30°C on a gentle cycle with a low spin, then run an extra rinse cycle to flush out every trace of soap. A front-loading machine is gentler than a top loader.

Hand washing works just as well if you prefer. Fill a sink or bath with lukewarm water and a capful of cleaner, agitate gently with your hands, then rinse thoroughly until the water runs clear. Never wring or twist the garment.

Drying and Reactivating the Finish

Here's the bit most people miss: gentle warmth often restores a tired DWR without any reproofing product at all. Check the care label first, but many waterproofs can be tumble dried on a low setting for twenty minutes, or air dried and then given ten minutes of low heat.

• Warmth encourages the DWR chemicals to reorient themselves across the fabric surface.
• A warm iron through a clean cloth, or a hairdryer on low, works on garments that can't be tumble dried.
• Never use a hot radiator, a direct heat source, or a high-temperature tumble setting — heat delaminates membranes.

To test the result, sprinkle a little water on the shoulder. It should bead and roll off. If it soaks in and darkens the fabric, it's time to reproof.

Reproofing: Spray, Wash-In, or Both

Choose spray-on reproofer for jackets with a separate lining or a three-layer construction, since you can target the outer face without affecting the inner surface that manages moisture. Wash-in products suit simple shell garments and fleece-lined jackets, though they can impair the wicking of linings.

Apply to a clean, damp garment, ideally outdoors or somewhere well ventilated. Two thin coats beat one heavy soaking — spray, allow it to dry, then apply a second pass. Finish with the same gentle warmth described above. Reproof before a big trip rather than after, so the finish has time to cure.

Habits That Add Years to Your Kit

Store waterproofs on a wide hanger in a cool, dry place away from sunlight and radiators. Long-term compression in a stuff sack creases the fabric and stresses seam tape, so keep that for the rucksack, not the wardrobe.

Clean zips with a soft brush and apply a little silicone or wax lubricant so they don't seize. Wash your rucksack separately — its grimy back panel is often the dirtiest thing pressed against your jacket. And let boots dry naturally, stuffed with newspaper, away from direct heat.

Look after your waterproofs like this and they'll reward you for many seasons: drier, lighter, more comfortable, and far less likely to let you down on the day the cloud comes down and the rain settles in for the afternoon.