The 5 Marketing Words That All Secretly Mean Polyester

Open any clothing site. Hit Ctrl-F. Type "performance." Type "technical." Type "microfibre." I'd bet you the composition tag underneath every single one says polyester.

I'm not against polyester. I'm against the language industry that grew up around it specifically to stop you noticing it's polyester. There's a whole vocabulary brands reach for when "plastic" would be technically accurate and commercially suicidal.

Five words. Same fibre. After today you're going to hear them like a dog whistle.

Word one — "performance"

You see this on running tops, gym shorts, base layers, anything athletic. "Performance fabric."

What it actually means, almost every time: polyester knitted in a way that pulls sweat off your skin and dries fast. The classic formula is something like 85% polyester, 15% elastane.

Here's where I have to be fair — for sport, this is real engineering. The knit structure creates little channels that move moisture from one side of the fabric to the other through capillary action. A good performance polyester running top will out-perform a cotton one for the actual job. The word is earned.

The problem is when it shows up on a casual polo shirt to make it sound technical. The polo isn't going for a 10K. It's going to a meeting. The "performance" tag is doing marketing work, not engineering work.

Word two — "technical"

Same thing, posher name. You see this in outerwear, in workwear, in "lifestyle" product that's pretending to be outdoor product. "Technical fabric."

It's polyester or nylon, sometimes with a coating (like DWR — durable water repellent — which often contains PFAS). The word does real work in mountaineering kit, where the membrane and the coating genuinely matter. It does less work on a city-coat that's never going up a mountain.

Test: if the brand's photos are of people on cliffs and the price is over £200, the "technical" probably means something. If the photos are people on the way to a coffee shop and the price is £49, the word is decorative.

Word three — "moisture-wicking"

This is the property, not the fibre — and the property is engineered around polyester's biggest weakness.

Here's the trick: cotton actually absorbs moisture better than polyester. It just hangs onto it forever. Polyester doesn't absorb much, so the moisture stays on the surface and evaporates fast.

The "wicking" is, basically, polyester being bad at absorbing water in a way that happens to feel good when you're sweating. Calling it "moisture-wicking" makes it sound like a feature was added. The feature is the plastic.

None of this is a lie. It's just framing a structural property as if it's a special-engineered upgrade.

Word four — "premium blend"

This one I find a bit cheeky.

"Premium blend" usually means polyester mixed with a small amount of cotton or wool to make it sound elevated. Common formulations:

• 65% polyester, 35% cotton chinos — sold as "premium" because they don't crease
• Wool-poly suit — the poly's there to cut cost and stop the suit creasing
• Cashmere-blend sweater — sometimes as little as 5% cashmere, the rest acrylic or polyester

The word "premium" is doing the heavy lifting. The blend is mostly there for the brand's margin and the garment's wash performance, not your benefit. Worth knowing where the percentage actually sits before paying the premium price.

Word five — "microfibre"

This is the one most people get wrong, including me until recently.

Microfibre isn't a fibre — it's a size. It just means any synthetic fibre spun extremely fine, usually less than one denier (a denier is the unit for fibre thickness).

In practice, it's almost always polyester, sometimes blended with polyamide (nylon) for cleaning cloths. When a bed sheet brand says "microfibre sheets," they mean polyester sheets spun fine enough to feel soft. When a sportswear brand says "microfibre lining," same deal. The "micro" is the marketing. The fibre is the same.

And worth noting — finer fibres often shed more microplastic per wash, because there's more surface area and more fibres to break off.

Sometimes the words are earned. Sometimes they're a fog machine.

I want to be clear — sometimes those five words describe genuine performance. A real running top really is engineered. A real rain shell really is technical. I'm not telling you to never buy polyester.

I'm telling you the words are doing two jobs at once:

1. Sometimes they describe genuine performance properties
2. Sometimes they're a fog machine to keep ordinary plastic feeling like a luxury upgrade

The move is simple — ignore the adjective, read the composition tag. The tag tells you the truth. The hero copy tells you the story.

The quick translation table

You see	It usually means	Earned when
Performance	~85% polyester, ~15% elastane	Actual sportswear
Technical	Polyester or nylon, sometimes coated	Real outdoor gear
Moisture-wicking	Polyester (the property is structural)	You're going to sweat in it
Premium blend	Polyester + small % of cotton/wool	Almost never — check the percentage
Microfibre	Polyester spun very fine	Cleaning cloths, technical layers

The fibre is what's actually against your skin. The words are how the brand wants you to feel about it. Reading both is the whole game.