Fast Fashion

Fast fashion is a production and consumption model in the clothing industry that prioritises rapid, mass and low-cost manufacturing. It is designed to respond quickly to market trends, offering affordable and constantly updated fashion. While this has democratised access to clothing, fast fashion has a significant environmental impact, particularly through greenhouse gas emissions, water consumption and pollution, and the generation of textile waste.

What is fast fashion?

Fast fashion is a business model focused on producing clothing quickly and cheaply to meet demand for the latest trends. Its key characteristics are:

• Short production cycles, sometimes lasting only a few weeks.
• Inexpensive, low-quality materials, such as polyester and synthetic blends.
• Mass production in low-labour-cost countries.
• High volumes of textile waste due to the short lifespan of garments.

The environmental impact of fast fashion

Greenhouse gas emissions

The fashion industry is responsible for an estimated 2 to 8% of global greenhouse gas emissions according to the UN Environment Programme (UNEP), with figures of up to 10% widely cited in the press. Key contributors include:

• Synthetic materials such as polyester, which depend on fossil-fuel-based production.
• International transport, as many garments are produced far from where they are sold.
• Energy-intensive dyeing and finishing.

As an illustration, producing a single cotton T-shirt can generate roughly 2 kg of CO₂e, while a pair of jeans can reach around 20 to 33 kg of CO₂e across its life cycle, depending on the study and system boundaries.

Water consumption and pollution

Fast fashion has a major impact on water resources. The textile sector is associated with around 93 billion cubic metres of water a year (Ellen MacArthur Foundation) and is estimated to produce about a fifth of global industrial wastewater. Dyeing and finishing generate effluent contaminated with chemicals that, without proper treatment, can be discharged into rivers and oceans. Measuring a company's water footprint helps quantify this pressure.

Textile waste

The short lifespan of fast fashion drives large volumes of textile waste. According to the European Environment Agency, each EU citizen generates around 16 kg of textile waste per year (2020 data), and globally less than 1% of textiles are recycled fibre-to-fibre into new garments; most are downcycled or landfilled.

Fast fashion and the carbon footprint

The carbon footprint measures the total greenhouse gas emissions associated with a product, service or activity. In fast fashion these arise across the entire value chain:

• Raw materials: extracting and manufacturing fibres (cotton, polyester).
• Manufacturing: energy-intensive dyeing and cutting.
• Transport: shipping from production countries to consumer markets.
• Use and end of life: washing and drying, plus incineration or landfill.

For most apparel brands, the bulk of emissions sit in Scope 3 (the supply chain), which is why measuring across all three scopes is essential.

Regulatory context in the EU

Europe is tightening the rules on textiles. The Waste Framework Directive, as amended in 2025, introduces mandatory Extended Producer Responsibility for textiles, making producers responsible for the cost of collection and treatment. In parallel, the Ecodesign for Sustainable Products Regulation (ESPR) sets durability and circularity requirements and will introduce a Digital Product Passport for textiles.

Solutions to reduce the impact

The first step towards sustainability is to measure the environmental impact of operations across Scopes 1, 2 and 3, which makes it possible to identify hotspots and prioritise action. From there, businesses and consumers can:

• Use recycled or sustainably sourced materials.
• Adopt energy-efficient production processes.
• Promote garment reuse, repair and upcycling.
• Shift towards circular models such as rental and resale.
• Encourage responsible consumption and buy less, better.

Measuring and reducing the industry's footprint is central to climate change mitigation. At Manglai we help fashion and retail companies measure their carbon footprint and prepare their sustainability reporting. Discover how Manglai can help you.