What is River Island made of?

River Island has been a fixture on the British high street since the 1960s. It's the brand you walk past in every shopping centre, the one that sits between Zara and New Look in both price and positioning. Trend-led, mid-range, and always chasing whatever's current. But behind the constantly rotating shopfront, what are the clothes actually made of?

We went through River Island's fabric compositions across their core categories. The results are about what you'd expect from a high street brand that prioritises trend speed over material quality -- but there are some surprises, both good and bad.

River Island's Fabric Profile: Synthetic-Heavy, Trend-Dependent

River Island leans heavily on synthetic fibres. Polyester is the dominant material across most categories, followed by viscose, polyamide, and acrylic. Cotton appears but is often blended. The brand doesn't hide this -- the compositions are listed on product pages -- but the marketing doesn't draw attention to it either.

What makes River Island interesting is that it occupies a genuinely mid-range position. It's not budget fast fashion like Boohoo or Shein, where 90%+ synthetic is the norm. But it's not premium enough to justify significant investment in natural fibres. The result is a brand where you can find decent cotton pieces if you look, but where the default across most categories is synthetic.

River Island's pricing -- typically higher than Primark or Boohoo but lower than Zara or & Other Stories -- creates an expectation of slightly better quality. Whether the fabric delivers on that expectation depends entirely on which category you're shopping and which specific piece you pick up.

Category Breakdown

Here's what River Island actually uses across their main categories:

• Dresses -- Polyester and viscose dominate. Going-out dresses, bodycon styles, and anything with a "satin" or structured finish are overwhelmingly polyester. More casual, flowy dresses lean on viscose. Cotton dresses exist but are seasonal and limited. If you're buying a River Island dress for a night out, it's almost certainly polyester. The percentage is typically 95-100% polyester or a polyester-elastane blend. That "satin" slip dress? Polyester with a satin weave. Every time.
• Tops -- A genuine split. Basic t-shirts and jersey tops are often cotton or cotton-polyester blends, with the cotton content varying from 50% to 100%. But blouses, going-out tops, and anything trend-driven shift to polyester and viscose. Knitted tops and bodysuits are typically synthetic. The rule of thumb: the more basic it looks, the more likely it is to contain cotton. The more "fashion" it looks, the more likely it's polyester.
• Denim -- River Island's most reliable category for natural fibres. Jeans are typically cotton-dominant, usually 70-99% cotton with elastane for stretch and sometimes polyester blended in. Rigid and straight-leg styles tend to have the highest cotton content. Skinny and super-stretch styles have more elastane and sometimes polyester. Overall, this is the safest category for natural fibres -- similar to what you'd find at most high street competitors.
• Knitwear -- Acrylic is the primary fibre in most River Island knitwear. Jumpers, cardigans, and knitted co-ords are predominantly acrylic, sometimes blended with polyester, polyamide, or small percentages of wool. Real wool-dominant knitwear exists but is priced higher and clearly positioned as premium within the range. Assume acrylic unless the product specifically calls out wool and the price reflects it.
• Outerwear -- A mix of polyester, polyamide, and occasionally wool blends. Puffer jackets and technical outerwear are fully synthetic. Blazers vary -- some are polyester, others use viscose or cotton blends. Wool coats appear seasonally but are typically blended with polyester or polyamide. Linings across all outerwear are polyester.
• Menswear -- Slightly better than womenswear on fabric composition. Men's basics lean more consistently on cotton. Polo shirts, t-shirts, and casual shirts frequently use 100% cotton. However, men's knitwear is still acrylic-heavy, and suiting relies on polyester-viscose blends rather than wool. Men's denim follows the same cotton-dominant pattern as women's.

The River Island Quality Question

River Island's positioning creates a specific tension. The prices suggest something above budget fast fashion. A River Island dress costs more than a Boohoo dress. A River Island jumper costs more than a Primark jumper. Shoppers reasonably expect that price difference to show up somewhere in the product.

Sometimes it does. The construction and detailing on River Island pieces are generally better than budget brands. Seams are neater, fits are more considered, and there's more attention to hardware and finishing. But the fabric itself doesn't always justify the price gap. A polyester dress is a polyester dress whether it costs twelve pounds at Boohoo or thirty-five pounds at River Island. The polyester might be a slightly heavier weight or a slightly better weave, but it's still polyester.

Where River Island genuinely differentiates on fabric is in specific premium pieces -- a real wool coat, a cotton-linen blazer, a 100% cotton poplin shirt. These items exist in the range and they represent genuine material quality. But they're the exception, not the standard, and they're priced accordingly.

River Island's Sustainability Efforts

River Island has introduced sustainability initiatives, including a commitment to sourcing more "preferred" fibres -- organic cotton, recycled polyester, responsibly sourced viscose. They publish a sustainability report and have set targets for reducing their environmental impact.

The problem, as with most high street brands, is scale. Sustainability targets coexist with a business model built on constant newness. River Island launches new styles weekly. The volume of production, the trend-driven turnover, and the reliance on synthetic fibres in the majority of their catalogue haven't fundamentally changed. Recycled polyester appears more frequently now, but as we've noted -- recycled polyester still sheds microplastics and doesn't biodegrade.

It's not that River Island's efforts are meaningless. Recycled and responsibly sourced materials are better than the alternative. But they're incremental improvements on a model that's still fundamentally fast fashion.

How to Check Before You Buy

River Island lists fabric composition on product pages, typically under "Composition" or in the product details section. It's there if you look for it, but like most brands, it's not front and centre. You have to click into each product, scroll past the styling suggestions, and find the materials list.

Fibr makes this automatic.

Fibr is a free Chrome extension that reads the fabric composition and shows it as a colour-coded badge directly on the product image while you browse. Green for natural fibres. Yellow for mixed. Red for mostly synthetic. No extra clicks, no scrolling through product details.

River Island support is coming soon. Fibr currently works on Zara, H&M, and Mango, and we're actively building out support for River Island and more UK high street brands. When it arrives, you'll be able to scan River Island's catalogue at a glance and spot the cotton pieces amongst the polyester.

Until then, the manual check takes thirty seconds: find the product, scroll to composition, and read. If it says polyester or acrylic first, that's the dominant material. If it says cotton or wool first, you've found one of the better pieces in the range.

Frequently Asked Questions

Is River Island good quality?

It depends on the category and the specific piece. River Island's construction and finishing are a step above budget fast fashion -- seams, hardware, and fit are generally better than Boohoo or Primark. But the fabric is often comparable to cheaper brands, particularly in trend-driven categories where polyester dominates. Denim and cotton basics represent genuine quality. Knitwear and dresses are more hit-or-miss. The best approach is to check the composition on each item -- a River Island piece in 100% cotton will outlast one in 100% polyester regardless of how much either costs.

What fabric does River Island use?

River Island uses a wide range of fabrics, but synthetics dominate across most categories. Polyester is the most common material in dresses, blouses, and structured pieces. Acrylic leads in knitwear. Viscose appears in flowy and draped items. Cotton is most present in basics, t-shirts, and denim. Wool, linen, and silk appear in premium pieces but are the exception rather than the rule. Elastane is blended into most stretch items. The composition varies significantly between categories and individual pieces.

Is River Island sustainable?

River Island has sustainability commitments including targets for preferred fibres, recycled materials, and responsibly sourced viscose. These efforts are real but incremental. The core business model remains fast fashion: frequent new collections, trend-driven production, and heavy reliance on synthetic fibres. Recycled polyester is appearing more often but is still functionally polyester. River Island is making improvements, but it hasn't fundamentally changed its approach to materials or production volume.