Is polyester really made from oil?

Yes, literally. Polyester (polyethylene terephthalate, or PET) is synthesised from refined petroleum byproducts — primarily ethylene glycol and terephthalic acid, both derived from crude oil. Around 70 million barrels of oil per year go into polyester clothing production globally.

What percentage of clothing is polyester?

Polyester makes up over 60% of all clothing produced globally — up from around 5% in 1980. It overtook cotton as the world's most-used fibre in the early 2000s and the gap has widened every year since.

Is recycled polyester actually better?

Better than virgin polyester, yes — it uses less oil and diverts plastic bottles from landfill. But recycled polyester still sheds microplastics every wash, still can't biodegrade, and most can only be recycled once before fibres degrade.

Polyester: You're Probably Wearing Oil

TL;DR — Polyester is the same crude petroleum that runs your car, spun into thread. Two British chemists invented it in 1941 trying to use up oil-refining waste. By the 1950s DuPont had branded it Dacron and sold it as a miracle fabric. It now makes up over 60% of global clothing production — not because it's the best fibre, but because it's the only fabric in history that doesn't need agriculture, climate or animals to exist.

What if I told you half your wardrobe is, basically, made out of oil?

Not "a bit like" oil. Actual oil — the same crude petroleum that runs your car. It's the single most common fabric on the planet right now, and it's called polyester. But the story of how oil ended up in your t-shirt isn't really about clothes at all. It's about what humans do with the things we don't know how to throw away.

What Humans Wore for 10,000 Years

Go back to before all of this. For most of human history, what you wore depended on where you lived. Cotton if you were somewhere hot enough to grow it. Wool if you had sheep. Silk if you had silkworms and the thousand years of knowledge to keep them alive. Linen if you grew flax. Hemp if you grew hemp.

Every single fabric needed land, animals, climate, infrastructure, time. Clothing was deeply regional. It was always a little scarce. And by modern standards, it was expensive — a working person owned maybe three sets of clothes in their entire life.

Then the Oil Industry Had a Waste Problem

The oil industry exploded in the late 1800s. Petroleum refining took off because everyone suddenly wanted oil — for lamps first, then engines, then everything.

The problem was that refining crude produced massive amounts of leftover stuff. Chemicals like ethylene, benzene, paraxylene — byproducts that nobody really knew what to do with. A lot of it got burned off into the sky or dumped into the ground around refineries. The industry was almost begging for someone to find a use for the waste.

Two Chemists in Manchester, 1941

And in 1941, two chemists in Manchester — John Whinfield and James Dickson — worked it out. They took one of those leftover petroleum chemicals and figured out how to spin it into a long, strong, plastic-like thread. They called it polyester.

By the 1950s, DuPont had licensed it, named it Dacron, and was marketing it as a miracle fabric — wouldn't wrinkle, dried in hours, kept its shape, machine washable, never needed ironing. Magazine ads showed men wearing the same shirt for sixty-seven days straight without washing it. That was a selling point.

Why It Took Over Everything

Here's the bit that actually mattered, though. Before polyester, every fabric in the world had a hard limit. Cotton couldn't grow in every climate. Wool needed sheep, which needed land and feed and shearing. Silk needed a specific caterpillar. Linen needed flax fields. Each region wore what its land could give it.

Then polyester showed up and quietly solved all of those problems at the same time. It could be made anywhere, from refined oil, in any quantity, in any colour, in any texture. You didn't need land. You didn't need animals. You didn't need a growing season. You needed a factory and a pipeline.

That's why it took over. Not because it was the best fabric. Because it was the only fabric in human history that didn't need agriculture, geography, or animals to exist.

Where It's Genuinely the Right Tool

I'll be fair to it. Polyester is genuinely useful. Cheap, strong, doesn't wrinkle, dries fast, holds colour and shape forever. For a rain jacket or a running top, it's exactly the right tool. There's a real reason people loved it.

The catch is just where it lives in your wardrobe now. It doesn't breathe. It holds onto odour (there's a whole bacterial science to it). It sheds microplastics every single wash into the water — and eventually into us. And it'll outlive you in a landfill by a couple of centuries.

Green light for the trail. Red light for the everyday t-shirt and the going-out dress. Same fibre, totally different call.

How to See It Before You Buy

Most product pages won't lead with "made of refined petroleum." They'll lead with "soft jersey tee" or "flowing maxi dress." The composition is buried at the bottom of the page in tiny text.

Fibr is a free Chrome extension that shows you the fabric composition of every garment — right on the product image — while you browse Zara, H&M, Mango and the rest. Red badge means mostly synthetic. Green means natural. No scrolling, no squinting, no surprises when the dress arrives feeling like a shopping bag.