What is Boohoo Clothing made of?

Boohoo is cheap. You already knew that. What you might not know is why it's cheap: the overwhelming majority of what they sell is made from synthetic fibres. Polyester, acrylic, nylon. Petroleum derivatives. Plastic you wear on your body, wash into the ocean, and throw away in six months.

We dug into Boohoo's actual fabric compositions across categories. Here's what we found, what UK regulators think about their claims, and how to check any item yourself before you buy.

Boohoo Is 60-80% Synthetic

Let's not dance around it. The vast majority of Boohoo's catalogue is synthetic. Depending on the season and category, somewhere between 60% and 80% of their garments are primarily made from plastic-based fibres.

Polyester is the backbone. It's in everything from party dresses to joggers to "cosy" knitwear. It's cheap to produce, holds bright prints well, and it's the reason Boohoo can sell a dress for six quid. The trade-off? It doesn't breathe, it pills after a few washes, it sheds microplastics every single time it hits water, and it takes two centuries to decompose.

Acrylic is the other culprit. Boohoo leans on acrylic hard for anything marketed as knitwear or "cosy." It mimics wool at a fraction of the cost, but it's one of the worst offenders for microplastic shedding -- worse than polyester, according to multiple studies. If you see "soft-touch" or "knitted" in a Boohoo product name, assume acrylic until proven otherwise.

Cotton shows up, sure. Mostly in basics and denim. But even when cotton appears, it's frequently blended with polyester or elastane, diluting whatever benefits you thought you were getting. Pure natural-fibre garments on Boohoo are the exception, not the rule.

Category Breakdown

Not all categories are created equal. Here's what you'll actually find when you look at the labels:

• Dresses -- Overwhelmingly polyester. Bodycon dresses, midi dresses, party dresses: polyester across the board. Some jersey dresses use viscose blends, but polyester dominates. Expect 85-100% synthetic on most listings. That "satin" finish? It's polyester with a shiny weave. It's not satin.
• Tops -- A mixed bag, but tilted synthetic. Crop tops and going-out tops are almost universally polyester. T-shirts and basics occasionally use cotton or cotton-polyester blends. Bodysuits are typically polyester-elastane. If it's under ten pounds, it's plastic.
• Knitwear -- Acrylic territory. Boohoo's jumpers, cardigans, and knitted co-ords are predominantly acrylic, sometimes blended with polyester or a token percentage of wool. That "chunky knit oversized jumper" is acrylic. That "soft ribbed cardigan" is acrylic. Wool is rare and never cheap on Boohoo.
• Jeans -- The one category where cotton actually leads. Most Boohoo jeans are cotton-based, typically 70-98% cotton with elastane for stretch and sometimes polyester blended in. Denim is the safest bet if you want natural fibres from Boohoo -- but check the specific composition, because some "jeans" are closer to jeggings and loaded with synthetics.

The pattern is blunt: the cheaper and trendier the category, the more synthetic it gets. Basics and denim skew slightly more natural. Everything else is plastic dressed up with marketing copy.

The UK Regulatory Scrutiny

Boohoo hasn't just drawn attention from shoppers. UK regulators have taken notice too.

The Competition and Markets Authority (CMA) has investigated fast fashion brands for potential greenwashing -- making environmental claims that don't hold up to scrutiny. Boohoo's sustainability messaging has been flagged as part of broader concerns about how fashion brands market "eco-friendly" or "sustainable" collections while the bulk of their output remains synthetic, disposable, and environmentally damaging.

The Advertising Standards Authority (ASA) has also cracked down on misleading environmental claims in fashion advertising. When a brand sells primarily polyester clothing at throwaway prices and simultaneously promotes itself as moving toward sustainability, regulators call that what it is: greenwashing.

Beyond environmental claims, Boohoo has faced scrutiny over labour practices in its Leicester supply chain, raising questions about the true cost of those low price tags. The fabric story and the labour story aren't separate -- they're two sides of the same race-to-the-bottom business model.

How to Check Before You Buy

Boohoo does list fabric composition on product pages. Buried. Beneath the size guide, beneath the styling suggestions, in text small enough that you'd never bother checking it for every item in a haul. Nobody browses a hundred products and clicks into each one to read the materials section. Boohoo knows this.

That's the problem Fibr solves.

Fibr is a free Chrome extension that reads the fabric composition and displays it as a colour-coded badge directly on the product image. Green for natural fibres. Yellow for mixed. Red for mostly synthetic. You see it while you browse -- no extra clicks, no squinting at fine print.

Boohoo support is coming soon. Fibr currently works on Zara, H&M, and Mango, and we're actively building out support for Boohoo, ASOS, PrettyLittleThing, and more. When it lands, you'll be able to see the synthetic content of every Boohoo product at a glance -- before it ends up in your basket.

Until then, here's the manual approach: click into the product, scroll to "Product Details" or "Composition," and read the fabric content. If the first word is polyester, acrylic, or nylon -- you're looking at plastic. If it says "100% polyester," that's the whole story. No amount of "sustainability" branding changes the composition label.

Frequently Asked Questions

Is Boohoo sustainable?

No. Not in any meaningful sense. Boohoo sells millions of garments made overwhelmingly from synthetic, petroleum-based fibres at prices that incentivise disposability. They've made sustainability pledges and launched "eco" collections, but the core business model -- cheap polyester at high volume -- hasn't changed. UK regulators have investigated the brand for potential greenwashing. Judge by the fabric label, not the press release.

What fabric does Boohoo use?

Primarily polyester and acrylic -- both synthetic, both plastic-derived. Polyester dominates dresses, tops, and most trend-led categories. Acrylic takes over in knitwear. Cotton appears mainly in basics and denim, but is often blended with synthetics. Viscose and elastane show up in smaller percentages. If you're shopping Boohoo and want to avoid synthetic fast fashion materials, your best bet is sticking to cotton denim and checking every label.

Is Boohoo clothing quality good?

You get what you pay for. Boohoo's price point demands synthetic fabrics, minimal construction, and thin materials. Polyester garments pill, lose shape, and trap odour faster than natural fibres. Acrylic knitwear bobbles after a few wears. Cotton basics hold up better but tend to be lightweight. If you're buying Boohoo knowing it's disposable fashion, the quality matches the price. If you're expecting something that lasts, check the composition first -- items with higher natural fibre content will generally hold up longer.