What is PrettyLittleThing made of?

PrettyLittleThing — PLT to its millions of Instagram followers — is Boohoo's louder, flashier sister brand. Same parent company, same supply chain infrastructure, same fundamental approach to fabric: synthetic first, everything else a distant afterthought. If Boohoo is cheap fast fashion, PLT is cheap fast fashion with better marketing and a bigger influencer budget.

We looked at PLT's actual fabric compositions across categories. The picture isn't pretty — but it is predictable.

PLT Is Overwhelmingly Synthetic

PrettyLittleThing is part of the Boohoo Group, and it shows in the fabric choices. Somewhere between 70% and 85% of PLT's catalogue is primarily synthetic. Polyester is the house fabric. It's in the going-out dresses, the co-ords, the blazers, the "satin" sets, the bodysuits — essentially anything that isn't explicitly marketed as cotton.

Polyester dominates for the same reason it dominates at Boohoo: it's cheap, it takes dye well, and it enables the sub-ten-pound price points that drive impulse purchasing. The cost is externalized — onto your skin (it doesn't breathe), onto the environment (microplastic shedding with every wash), and onto landfills (polyester takes 200+ years to decompose).

Nylon is PLT's second-favourite synthetic. You'll find it in activewear, shapewear, tights, and anything with a "second-skin" fit. It's more durable than polyester but equally plastic-derived and equally non-biodegradable. PLT's activewear push in recent years has only increased the nylon share of their catalogue.

Viscose appears more frequently at PLT than at Boohoo, particularly in summer collections — flowy midi dresses, wide-leg trousers, holiday sets. Viscose is technically derived from wood pulp, so it's not petroleum-based, but the manufacturing process is chemically intensive and environmentally destructive unless done responsibly. PLT doesn't specify whether they use conventional or sustainably-sourced viscose. Assume the former.

Category Breakdown

Here's what the labels actually say across PLT's core categories:

• Dresses — Polyester is king. Bodycon dresses, midi dresses, shirt dresses: polyester or polyester-elastane blends dominate. "Satin" dresses are polyester with a satin weave — not silk, not even close. Some summer styles use viscose. Cotton dresses exist but are rare. Expect 80-100% synthetic on the typical PLT dress.
• Tops & Bodysuits — Almost universally synthetic. Crop tops, corset tops, mesh tops, bodysuits: polyester, nylon, or polyester-elastane. Basic ribbed tops sometimes contain cotton blends, but they're the minority. If it's designed for a night out, it's plastic.
• Loungewear & Knitwear — Acrylic and polyester territory. PLT's "cosy" category is built on acrylic — the synthetic that mimics wool but sheds microplastics more aggressively than any other fabric. Oversized jumpers, knitted sets, loungewear co-ords: acrylic is the primary fibre. Fleece-lined items use polyester. Real wool is virtually nonexistent at PLT's price points.
• Jeans & Denim — The one bright spot. PLT's denim is mostly cotton-based, typically 70-95% cotton with elastane for stretch. Some styles blend in polyester, but cotton leads. This is consistent with the rest of the Boohoo Group — denim is the safest natural-fibre bet across all their brands.
• Activewear — Nylon-elastane and polyester-elastane blends. This is expected for activewear — even premium brands use synthetics here — but it's worth noting that PLT's activewear is priced and constructed at the fast fashion end. Don't expect the durability or technical performance of dedicated sportswear brands.

The pattern mirrors Boohoo's because the supply chain is the same: trend-driven categories are almost entirely synthetic, while basics and denim offer slightly more natural-fibre options.

The Sustainability Question

PLT has made noise about sustainability. They've launched "recycled" collections, partnered with sustainability influencers, and added environmental messaging to their website. The reality?

Recycled polyester is still polyester. It still sheds microplastics, it still doesn't biodegrade, and a "recycled" label on 5% of a catalogue doesn't offset the other 95%. PLT's recycled collections are a drop in a synthetic ocean — and they serve primarily as marketing tools that let the brand claim progress while the core business model remains unchanged.

The Boohoo Group as a whole has faced intense scrutiny. The UK's Competition and Markets Authority (CMA) has investigated green claims across the fashion industry, and the Boohoo Group's practices have drawn particular attention. When your business model depends on selling millions of units of disposable clothing made from petroleum-based fibres, no amount of "conscious collection" marketing changes the fundamental equation.

PLT's target demographic — Gen Z shoppers, predominantly aged 16-24 — is theoretically the most environmentally aware generation. The irony is stark: the generation most likely to post about sustainability on social media is also the generation driving the fastest churn of synthetic fast fashion in history.

How to Check Before You Buy

PLT does list fabric compositions on product pages, but like Boohoo, they're buried. You have to click into each product, scroll past the imagery and upsells, and find the materials section. When you're browsing 50 items in a haul, nobody does that.

That's what Fibr is built for.

Fibr is a free Chrome extension that reads fabric composition and shows 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 instantly while you browse — no extra clicks, no fine print.

PLT support is coming soon. Fibr currently works on Zara, H&M, and Mango, with PrettyLittleThing, Boohoo, ASOS, and more in active development. When it launches, you'll see the synthetic content of every PLT product at a glance — before it reaches your basket.

In the meantime, check manually: open the product page, find "Product Details" or "Composition," and read the label. If the first fibre listed is polyester, nylon, or acrylic — that's the dominant material. That's what you're buying. That's what you're wearing.

Frequently Asked Questions

Is PrettyLittleThing sustainable?

No. PrettyLittleThing is part of the Boohoo Group and operates on the same ultra-fast fashion model: high volumes of predominantly synthetic garments at rock-bottom prices. They've introduced small recycled collections and sustainability messaging, but the vast majority of their catalogue remains polyester, acrylic, and nylon. Recycled polyester is still plastic. The business model — sell cheap, sell fast, replace quickly — is fundamentally at odds with sustainability. Check the fabric composition on individual items rather than trusting marketing claims.

What fabric does PrettyLittleThing use?

Primarily polyester, with significant amounts of nylon and acrylic depending on the category. Polyester dominates dresses, tops, and most trend-led pieces. Nylon features heavily in activewear and shapewear. Acrylic is the go-to for knitwear and loungewear. Cotton shows up mainly in basics and denim. Viscose appears in some summer pieces. Overall, expect 70-85% of PLT's range to be primarily synthetic at any given time.

Is PrettyLittleThing the same quality as Boohoo?

Very similar. Both brands are part of the Boohoo Group and share supply chain infrastructure. PLT positions itself as slightly more premium with its branding and influencer partnerships, but the fabric compositions are comparable — overwhelmingly synthetic, with similar weight and construction quality. PLT's slightly higher average price point doesn't consistently translate to better materials. The best way to compare is to check fabric composition on specific items. A polyester dress is a polyester dress regardless of which Boohoo Group brand sells it.