How Waterproof Clothing Actually Works

What Does Waterproof Actually Mean?

The word describes a construction — a barrier plus sealed seams plus protected openings — not a promise that no water can ever reach you.

Updated 2026-10-19

What Is a Hardshell Jacket?

The category name for a waterproof, windproof shell built for sustained bad weather — and the trade-offs that come with it.

Updated 2026-10-19

Hardshell vs Softshell

A hardshell bets everything on keeping weather out; a softshell bets everything on comfort while you move. The forecast decides which bet is right.

Updated 2026-10-19

GORE-TEX Explained

GORE-TEX is not one fabric but a licensed platform with garment-level certification — which is both its strength and the reason it publishes no numbers.

Updated 2026-10-19

Waterproof vs Water-Resistant

The distinction is about construction, not marketing vocabulary. Taped seams are the clearest dividing line you can check for yourself.

Updated 2026-09-01

Waterproof Ratings Explained

A millimetre rating is one laboratory measurement of one flat patch of fabric. What it records, which standards govern it, why identical numbers are not comparable, and what decides whether a jacket keeps you dry.

Updated 2026-09-15

What Does 20,000 mm Waterproof Mean?

What the extra pressure resistance buys, where it stops making a practical difference, and why two jackets sharing the figure can behave differently in the same downpour.

Updated 2026-09-15

Is 10,000 mm Waterproof Enough?

What a 10,000 mm rating covers in real use, how it compares with 5,000 mm, 20,000 mm and 30,000 mm, and a decision framework that puts the number in its proper place.

Updated 2026-09-15

Hydrostatic Head Explained

The test itself: how it is run, which standards define it, how results must be reported, why figures from different methods are not interchangeable, and why a laboratory pressure result cannot predict how a finished jacket behaves in rain.

Updated 2026-09-15

Breathability Explained

How moisture actually leaves a jacket, why three different measurements all get called breathability, and why comfort depends on far more than any single figure.

Updated 2026-09-15

MVTR Explained

Moisture vapour transmission rate, the several different standards behind it, and why a bigger number is not automatically better.

Updated 2026-09-15

RET Explained

Evaporative resistance, the standard behind it, and an honest look at whether the widely quoted RET comfort bands have a verifiable origin.

Updated 2026-09-15

2-Layer vs 2.5-Layer vs 3-Layer Waterproof Jackets

What sits behind the waterproof barrier, what that changes, and the properties layer count does not determine at all.

Updated 2026-09-15

What Is DWR?

Durable water repellent finishes: what they do, what they cannot do, and how the chemistry terminology differs from brand to brand.

Updated 2026-09-15

What Is a Waterproof Membrane?

Membrane, coating, laminate, face fabric, backer, DWR and seam sealing — what each contributes, and which brands actually publish what they use.

Updated 2026-09-15

GORE-TEX vs Other Waterproof Membranes

The competing platforms, what each one actually publishes about itself, and why the comparison cannot end in a winner.

Updated 2026-09-16

Does GORE-TEX Leak?

Wet-out is not proof of a leak. Inspect the fabric, seams and closures; the reviewed sources do not establish a universal order of failure.

Updated 2026-10-19

Waterproof Jacket Seams Explained

Every stitch is a row of holes. Seam tape covers them — and the difference between 'fully taped' and 'critically taped' is the difference between waterproof and mostly waterproof.

Updated 2026-10-19

Waterproof Zippers Explained

A zip is a deliberate gap in the barrier. How the jacket covers that gap — flap, laminated coil, or both — decides whether rain gets in.

Updated 2026-10-19

PFAS in Waterproof Jackets Explained

PFAS did two jobs in waterproof clothing — membranes and water-repellent finishes — and the industry is removing them from both, at different speeds.

Updated 2026-10-19

Are PFAS-Free Jackets as Waterproof?

PFAS status alone does not establish waterproof performance or finish longevity. Compare the exact garment’s documented construction and care instructions.

Updated 2026-10-19

Why Does My Waterproof Jacket Feel Wet Inside?

Condensation, wet-out, water through openings and barrier damage can cause similar wet feelings. These checks help you decide what to do next.

Updated 2026-10-19

How Long Does a Waterproof Jacket Last?

Service life depends on construction, use, care and damage. Lost repellency may be renewable; structural damage needs a repair assessment.

Updated 2026-10-19

How to Wash a Waterproof Jacket

Gore, Patagonia, Arc’teryx and Rab publish care guidance that treats washing as maintenance. Details differ, so the garment’s care label comes first.

Updated 2026-10-19

How to Reproof a Waterproof Jacket

Reproofing renews the finish on the outer fabric. It cannot fix a membrane, and it works only on a clean jacket.

Updated 2026-10-19

How to Repair a Waterproof Jacket

Some small tears can be patched following garment and patch instructions. Structural damage and laminate separation need professional assessment.

Updated 2026-10-19

How to Store Waterproof Jackets

Clean, completely dry, and hung — not stuffed. The enemies of a stored shell are moisture, compression and sunlight.

Updated 2026-10-19

How to Choose a Waterproof Jacket

A decision order that starts with your use and ends — not begins — with fabric branding, and which specifications can honestly be compared between brands.

Updated 2026-09-16

How Important Are Pit Zips?

No membrane moves moisture as fast as an open zip. Whether you need that zip depends on how hard you work and how much weight you carry.

Updated 2026-10-19

How to Layer Under a Waterproof Jacket

Adjust insulation, fit and ventilation to the conditions. Layering helps manage warmth and moisture but cannot guarantee a dry interior.

Updated 2026-10-19