Polyester has become the dominant material in fast fashion, with retailers such as Shein relying heavily on the fabric, according to an analysis of the industry's environmental impact.
The material, made from petroleum, accounts for a significant share of clothing produced by major fast-fashion brands, complicating efforts to reduce the sector's carbon footprint.
Industry reliance on synthetic fibres
Despite pledges by many companies to increase the use of recycled materials, the overall share of polyester in new clothing has continued to rise, the analysis found.
Shein, the Chinese online retailer, has faced particular scrutiny for its use of the fabric, which is cheap to produce but difficult to recycle and does not biodegrade.
Impact on sustainability goals
The findings highlight the gap between corporate sustainability commitments and actual production practices, as the fashion industry remains heavily dependent on virgin plastic-based fibres.
Environmental groups have long called for stricter regulation and greater investment in alternative materials, but the economics of fast fashion continue to favour polyester.
