Polyester is the fabric of modern fashion. It's in more than half of all clothing produced globally, it's the default material for fast fashion, and its use is still growing. This page consolidates every key data point about polyester in fashion into a single reference.
Global Polyester Production
Polyester surpassed cotton as the world's most-produced fibre in the early 2000s. Since then, the gap has only widened. While cotton production has remained relatively flat (limited by agricultural land and water), polyester production has scaled with the petrochemical industry.
The growth is driven by two factors: fast fashion's explosive expansion (requiring ever-cheaper materials) and polyester's dramatically lower cost compared to natural fibres. Polyester can be produced at roughly half the cost of cotton per kilogram — a margin that makes the fast-fashion business model possible.
Polyester in Retail — Fibr's Product Data
Fibr has analysed fabric composition across 17,365+ products from major fashion retailers. Here's how polyester shows up in real product data.
By Retailer
| Retailer | Products Analysed | Avg Natural Fibre % | 100% Natural | Polyester-Heavy |
|---|---|---|---|---|
| Bershka | 9,339 | 62.7% | 45.7% | 25.6% |
| Zara | 5,226 | 60.6% | 43.4% | 28.1% |
| Mango | 2,246 | 59.3% | 40.0% | 25.6% |
| Reformation | 399 | 57.0% | 52.9% | 5.3% |
Key finding: even at retailers with above-average natural fibre usage, approximately one in four products is polyester-heavy. Reformation is the notable exception at just 5.3% polyester-heavy — but its overall average natural fibre percentage (57%) is actually lower than the fast-fashion brands, indicating heavy use of semi-synthetic blends.
By Product Category (Zara)
Polyester's presence varies dramatically by category. This is perhaps the most useful data for consumers:
The pattern is clear: where cotton and denim are traditional (jeans, T-shirts), natural fibres still dominate. Where brands have discretion (dresses, outerwear, activewear), they default to polyester. Hoodies at 19.1% natural fibre — meaning over 80% synthetic — represent the worst case.
By Product Category (Bershka)
| Category | Avg Natural Fibre % |
|---|---|
| Jeans | 98.7% |
| T-shirts | 87.1% |
| Sweaters | 38.2% |
Bershka's sweater category at 38.2% natural illustrates a broader trend: knitwear has been heavily replaced by acrylic and polyester blends. A "wool-look" jumper on the high street is probably 60%+ plastic.
The Microplastic Problem
Every time a polyester garment is washed, it sheds microscopic plastic fibres. These fibres are too small for most washing machine filters and wastewater treatment plants to capture. They end up in rivers, oceans, soil, and eventually in the food chain.
Microplastic fibres from textiles have been found in:
- Human blood and lung tissue
- Breast milk
- Placental tissue
- Drinking water (tap and bottled)
- Sea salt, honey, and beer
- Deep ocean sediments and Arctic ice
The health effects of microplastic accumulation in human tissue are still being studied, but early research has linked them to inflammation, oxidative stress, and potential endocrine disruption. See our full microplastics data page for more.
Polyester Growth Trends
Polyester's share of global fibre production has grown steadily:
- 2000: Polyester overtakes cotton as the world's most-produced fibre
- 2010: Approximately 40 million tonnes produced annually
- 2020: Over 55 million tonnes, despite pandemic disruption
- 2025-26: Estimated 60+ million tonnes annually
The growth is driven primarily by fast fashion's expansion, particularly in Asia and emerging markets. Brands like Shein — which adds thousands of new styles daily — are only possible because of polyester's rock-bottom cost and infinitely scalable production.
Why Polyester Dominates Fashion
Understanding why the industry uses so much polyester is key to understanding whether it will change:
Cost
Polyester costs roughly $1-1.50 per kilogram. Cotton costs $2-3+. For a fast-fashion brand producing millions of garments at ultra-low margins, that difference is existential. Polyester makes $5 T-shirts and $15 dresses financially possible.
Scalability
Cotton requires farmland, water, and growing seasons. Polyester requires petrochemical plants and can be scaled instantly to meet demand. There's no seasonal constraint, no weather risk, no land limitation.
Versatility
Polyester can be engineered to mimic almost any fabric — silk-like satin, wool-like knits, cotton-like jersey. This allows brands to create cheap versions of expensive-looking garments.
Consumer Acceptance
Most consumers don't check fabric composition. They buy based on appearance, price, and style. Until consumers start actively choosing natural fibres, brands have no financial incentive to switch.
The Recycled Polyester Question
Brands increasingly market "recycled polyester" (rPET) as a sustainable solution. The data complicates this narrative:
- Same microplastic shedding — recycled polyester releases identical microplastics to virgin polyester
- Same comfort issues — recycled polyester doesn't breathe, absorb moisture, or regulate temperature any better
- Near-zero textile-to-textile recycling — less than 1% of clothing is recycled back into clothing. Most rPET comes from plastic bottles, which could be recycled into new bottles infinitely but can only become clothing once
- Greenwashing vector — "made from recycled materials" is the fashion industry's favourite sustainability claim because it sounds good while changing nothing about the product's performance or end-of-life impact
Recycled polyester is marginally better than virgin polyester. It is not a substitute for natural fibres.
What Consumers Can Do
The data points to a clear consumer strategy:
- Check fabric composition before buying. This single action changes your wardrobe more than any other.
- Avoid polyester-heavy categories. Hoodies, outerwear, activewear, and dresses are where polyester dominates. Be most selective here.
- Buy natural-fibre basics. Jeans, T-shirts, and shirts are reliably cotton. Start here.
- Wash synthetics less and cooler. If you do own polyester, washing less frequently and at lower temperatures reduces microplastic shedding.
- Consider a microplastic filter. Washing machine filters like Guppyfriend bags or in-line filters capture some shed fibres.
- Vote with your wallet. Every natural-fibre purchase signals demand. See which retailers score highest for natural fibres.