What to wash a ski jacket with, and what re-proofs it

Why a jacket stops beading, and which cause you have

This is the whole decision, and it takes one minute to diagnose. Run a tap over the shoulders and forearms of the jacket.

• Water beads up and rolls off: the DWR is fine. Nothing on this page is needed yet.
• Water soaks in as a dark patch: the jacket has “wetted out”. Now work out which of the two causes it is.
• If it has not been washed in a season or more: wash it first. Body oils, sunscreen and sweat salts on the face fabric stop water beading all by themselves, and a surprising number of jackets come back from a single correct wash. That is what the cleaner is for, and it is the cheaper answer.
• If it is clean and still wetting out: the DWR has worn off. That needs re-proofing, which is the second product. Wear points go first - shoulders under a pack strap, forearms, the seat of a bib.

Who each of these is for, and who should skip it

• A shell or insulated ski jacket that is wetting out: the DUO-Pack. Both steps, in the right order, in one box.
• A jacket that has never been washed: the Tech Wash bottle alone. Wash it, re-test with the tap, and only buy a re-proofer if it still fails.
• A down jacket or down mid layer: Down Proof, and a down-specific cleaner before it.
• Skip all of it for a soft shell, a fleece or a base layer. Those are not waterproof garments and re-proofing them achieves nothing - what a mid layer is actually for.
• Skip it if the jacket leaks at the seams rather than wetting out. A failing seam is a different repair - the sealant and patch kits cover that.

What this page ranks on

• 1. Which job it does. Cleaner, re-proofer, or both. This is the only thing most buyers get wrong and it is published plainly on every bottle.
• 2. Published chemistry. Water-based, and free of fluorocarbons, VOCs and optical brighteners. Nikwax publishes all three across the range, which is why the range is what this page is built from.
• 3. Wash-in or spray-on. Wash-in treats the whole garment evenly in the machine; spray-on treats only the outside and only where you aimed. For a ski jacket, wash-in is the more forgiving choice.
• 4. Published sizes. Because a family washing four shells and two bibs needs the liter bottle, not the 10 oz.
• Not washes-per-bottle. We tried to source it and the retailer figures contradict each other - one listing says twenty washes per liter, another says three. Nikwax's own site did not load for us. So this page does not quote a figure, because quoting one would mean picking a number off somebody else's page and hoping.

The three, compared

The row that matters is the second one. Tech Wash adds no water repellency. It is a cleaner. People buy it expecting beading to come back, and sometimes it does - because the dirt was the problem - but if the DWR is genuinely worn you need TX.Direct as well, which is why the DUO-Pack is the pick rather than the cheaper bottle.

The picks

Nikwax Hardshell Cleaning & Waterproofing DUO-Pack

The pick, because it is the only product here that finishes the job. Published as Tech Wash plus TX.Direct, 300 ml of each: step one strips the contamination that is blocking the finish, step two puts a fresh durable water repellent onto the fibers. Both are published as water-based and free of fluorocarbons, VOCs and optical brighteners.

Wash-in rather than spray-on is the right default for ski outerwear specifically. A spray relies on you covering every panel evenly, and the panels people miss are the ones that matter - the inside of the forearm, under the arm, the seat of a bib. A wash-in treatment does not care how carefully you aim.

Honest cons. It is dearer than the cleaner alone, and most jackets need re-proofing only every few washes, so you will have TX.Direct left over. No coverage figure is published. Wash-in treats the garment inside and out, which some people would rather not do to a removable liner. And Nikwax publishes no US MSRP on a page we could reach.

Nikwax Tech Wash

The one to buy first if the jacket has simply never been washed, and the one bottle that belongs in every ski household. Published as a technical cleaner for waterproof-breathable garments, in 10 fl oz and 34 fl oz - water-based, biodegradable, no fluorocarbons, no VOCs, no optical brighteners.

The practical case for starting here: the usual cause of a jacket wetting out in its first three seasons is contamination, not wear. Sunscreen is the quiet culprit on a ski jacket specifically - it goes on your face and ends up on your collar - along with sweat salts and the body oils that collect anywhere fabric touches skin. One correct wash often fixes it, and it costs about a third of the DUO-Pack.

Honest cons, and they are the reason this is second rather than first: it adds no water repellency whatsoever, which is not what most buyers assume. No washes-per-bottle figure is published that we could verify. A genuinely worn DWR needs the second product. And the big bottle is the better value if you own more than two shells.

Nikwax Down Proof, and why it carries the skip

Published as a wash-in waterproofing for down-filled items, in 300 ml. It earns its place on this page and it is also wrong for most of the people reading it, which is exactly what a skip note is for.

Down is a different problem. The fill loses loft when it gets damp and the garment loses most of its warmth with it, so the goal is water repellency that does not mat the down - which is a different formulation from a shell treatment. If you own a down mid layer, this is the right product; the mid layer roundup covers whether down is the right mid layer for skiing in the first place, and the short answer there is that synthetic usually wins on snow.

Honest cons. Wrong for a shell or a synthetic insulated jacket, which is most ski outerwear. Down needs a cleaner formulated for down before this, so it is a two-product job as well. No coverage figure published. And down must be tumble dried with dryer balls afterward to break up the clumps, which is the step people skip and then conclude the product failed.

How to do it without wrecking anything

• Run the machine empty first if you normally use detergent or fabric softener. Residue in the drum will undo the whole exercise.
• Do up the zippers, undo the pit zips, release the powder skirt. Closed zippers keep their shape; open vents let water move through.
• Wash one or two garments at a time, not six. The treatment has to reach the fabric.
• No fabric softener, ever. It is the one additive that will coat a membrane and stay there.
• Heat is what sets a DWR, within reason. A warm tumble dry or a cool iron through a cloth reactivates a factory finish. Check the garment label first, and never do this to a down jacket on high heat.
• Dry it properly afterward. Room temperature and moving air, not a radiator.

When to do it, and what else is due at the same time

Once a season, and the right once is at the end rather than the beginning - a season's grime left to sit over summer is harder to shift, and a jacket that goes into storage clean comes out ready. The season maintenance schedule puts this in its slot alongside the three other jobs that are due in the same twenty minutes, and the storage page covers the rest of the April routine.

Two related repairs worth checking while the jacket is out of the wardrobe: the zippers and buckles, and any tear or lifting seam. Both are cheaper to fix than to ignore, and both are easier to spot on a clean garment.

And if the honest answer is that the jacket is past saving: what the published numbers say about a replacement, and whether the old one is worth selling - a re-proofed jacket that beads water sells for noticeably more than one that does not, which makes this the last job before you list it.