¿Waterproof, TEX, water-resistant or rain boots?

The truth about rain shoes that no one tells you

It’s starting to rain and, of course, we all want to keep our feet dry. But… ¿do you really know what waterproof means? ¿and how does it differ from a shoe with a TEX membrane or a rain boots?

Spoiler: not everything that promises to “keep you dry” delivers.

Waterproof ≠ fully waterproof

When a shoe is advertised as “waterproof”, it often does not have an internal technical membrane. What it does have, usually, is a water repellent treatment (DWR) or a plasticized outer layer that makes the drops slide off.

🟢 Holds up well to light rain or splashes.
🔴 Fail in heavy rain, long walks or if you step in puddles.

In short: water does not penetrate immediately, but if exposure is prolonged or the tongue gets wet, it will eventually enter.

Footwear with TEX membrane (Gore-Tex, Sympatex, Hydro-Tex…)

Here we are talking about real technical waterproofing. These models include a microporous membrane between the lining and the outside of the shoe.

Its pores are smaller than a drop of water, but larger than a molecule of steam.
That means:

• No water enters from the outside.
• It does allow sweat to escape (perspiration).

Perfect balance between protection and comfort.
But be careful, they are not infallible!

The tongue, the weak point of 99% of shoes

Even if the shoe has a TEX membrane, if the tongue is not completely sealed, water can seep in.

• The laces act as a funnel, channeling water towards the instep area.
• Side seams may leave gaps.
• And if the shoe is low-cut, it is enough to step in a puddle deeper than the instep for water to enter from above.

Always look for models with a gusseted (sealed) tongue or high top boot if you need maximum protection.

Waterproof boots: the only ones 100% waterproof

Made of rubber or PVC, seamless and with a high upper, they do not let a single drop pass through the instep, tongue or ankle.

✅ Ideal for heavy rain, puddles and mud.
❌ They do not perspire, so if you wear them for many hours… your feet will end up wet (but from sweat, not water).

What if the sock is wet? It’s not always leakage

This is key and almost no one explains it. Sometimes you notice the wet sock and think “water has gotten in,” but it has not.

If the shoe has a waterproof membrane but little ventilation, sweat condenses inside. The foot perspires, the humidity is not completely evacuated and the sock ends up wet… even if the water has never passed through from the outside.

That is why it is important:

• Choose technical socks or fine wool socks (they prevent condensation).
• Ventilate shoes well after use.

Key differences

Type of footwear	Include membrane	Breathable	Level of protection	Ideal for
Water-resistant / repellent	❌ No	🟡 Medium	Light rain, city	Humid days, short walks
Waterproof (without membrane)	❌ Not always	🔴 Low	Light rain, splashing	City, occasional use
With TEX membrane (Gore-Tex, etc.)	✅ Yes	🟢 High	Moderate rain, prolonged humidity	Routes, daily use, autumn
Technical waterproof (sealed seams)	✅ Yes	🟢 High	Heavy rain	Long walks
Rain boot	❌ No	🔴 Null	Puddles, mud, heavy rain	Heavy rain, children, field

How to choose according to your daily life

• Light rain or city: “water-resistant” or “water-repellent” footwear.
• Moderate rain or cold days: footwear with TEX membrane.
• Heavy rain or long routes: technical raincoat with taped seams.
• Puddles and mud: rain boots.

In a nutshell

“Waterproof” does not always mean waterproof.
“Water-resistant” does not always include membrane.
And “wet feet” does not always mean water has entered.

The more you know about how your footwear works, the better you will be able to choose the one that really takes care of your feet (and your little ones).