What Is the Best Fabric for Women’s Underwear?

Cotton. Bamboo. Nylon. Modal. Microfibre. Lace. Mesh.

There are a lot of fabrics in the average underwear drawer, and plenty of conflicting advice about which one we're apparently supposed to be wearing.

Search for the "best fabric for women's underwear" and you'll often encounter one very simple answer: cotton.

But good underwear is a little more complicated than that.

Different parts of a pair of underwear have different jobs. The fabric that sits directly against your most intimate skin doesn't necessarily need to be the same fabric that provides stretch, support or shape elsewhere.

So rather than asking which one fabric is best, perhaps the better question is: What do you need each part of your underwear to do?

Why is cotton so often recommended for women's underwear?

There's a reason cotton comes up so frequently in conversations about underwear.

It's a natural fibre, it's breathable and it can absorb moisture. It's also generally soft against the skin, which is particularly important when we're talking about the vulva.

Health guidance around vulval care frequently recommends cotton or other natural-fibre underwear, particularly for women experiencing irritation or sensitivity. The Royal College of Obstetricians and Gynaecologists, for example, recommends loose-fitting cotton or silk underwear where vulval skin is sensitive or irritated.

That doesn't mean your entire pair of underwear has to be made from cotton. But it does make a pretty compelling case for thinking carefully about the fabric that sits directly against your skin.

The fabric on the outside has a different job

Here's where things get more interesting. A beautiful pair of underwear also needs to move.

It needs to stretch when you sit down, recover when you stand up, stay in place when you walk and retain its shape after being worn and washed repeatedly.

This is where fibres such as nylon and elastane can be incredibly useful.

Stretch fabrics can create a close, flexible fit without requiring bulky construction, and can provide lightness and breathability. Different fabric weights can provide more or less support.

And, of course, these fabrics also allow designers to create underwear that actually looks like lingerie.

At Wicks, we're not particularly interested in choosing between beautiful and practical.

We'd rather use different materials for the jobs they're good at.

What matters most is what sits against your skin

Turn a pair of underwear inside out and you'll find arguably its most important piece of fabric. The gusset.

We've written before about [what an underwear gusset is and why it matters], but from a fabric perspective, this is where we'd pay particular attention.

The vulva is sensitive skin, and this fabric sits directly against it for hours at a time.

That's why every Wicks pair is lined in GOTS-certified organic cotton, even when the outer garment is made from something completely different.

It means we can use soft stretch fabrics to create the lingerie on the outside, while keeping organic cotton against the skin.

It's a detail that you'll probably notice when you're wearing Wicks, but to look at a Wicks piece being worn, you wouldn't know about the inner construction.

What about moisture-wicking fabrics?

"Breathable" and "moisture-wicking" are often used as though they mean exactly the same thing. They don't.

Breathability broadly refers to how readily heat and water vapour can move through a fabric. Moisture-wicking describes the movement of liquid moisture away from the skin.

Why that matters in underwear is because bodies aren't particularly consistent.

You might be sitting at a desk one moment and rushing for a tram the next. Perimenopause can bring hot flushes and changes in sweating. Exercise creates moisture. Melbourne can simply decide that yesterday's 17 degrees should be today's 35. Or Brisbane might be hot outside and air-conditioned inside.

And then there are life's little leaks. The aim isn't to pretend moisture never happens, it's to think carefully about what happens when it does.

Does absorbent underwear need to feel bulky?

No.

And this is where fabric construction matters just as much as fibre choice.

Our All Day Fresh styles have a discreet absorbent layer of organic cotton but no waterproof barrier. They're designed for everyday freshness and those little moments when you want your underwear to quietly do a bit more, while remaining beautifully breathable and seriously comfortable.

When greater protection is needed, additional layers can be incorporated into the gusset, including a waterproof barrier.

That means two pairs of underwear can look remarkably similar from the outside while doing quite different jobs underneath. We rather like that.

Functionality doesn't need to become the entire personality of your underwear.

So, what should you actually look for?

Rather than becoming fixated on a single fibre, look at the garment as a whole.

What's sitting directly against your skin? Does it feel soft? Is the garment breathable? Does it have enough stretch to move with you? Does it recover its shape? Does it manage moisture in a way that suits your body? And does it provide any additional functionality you actually need?

Then there's the most overlooked question of all: Do you actually enjoy wearing it?

Because the technically "perfect" fabric isn't terribly useful if the resulting underwear lives permanently at the back of your drawer.

The best underwear uses fabric intelligently

There isn't one perfect underwear fabric.

There's the right fabric, in the right place, doing the right job.

For us, that means soft organic cotton against intimate skin, stretch and movement where the garment needs it, and discreet functionality built underneath when it's useful.

Because good underwear design isn't about choosing between comfort, function and beauty.

It's about understanding how to make all three work together.