What is sustainable fashion?

19 August 2026

… and where do animals fit into it?

By the ACTAsia team · Reviewed by our Compassion in Fashion programme staff · Updated 15 June 2026. Through Compassion in Fashion, ACTAsia works with designers, students and shoppers across Asia on kinder, cleaner clothing.

Sustainable fashion means designing, making and buying clothes in ways that reduce harm to the planet, to workers and to animals. It covers materials, emissions, water, waste and labour. A truly sustainable wardrobe also considers animal welfare, since materials like fur, and to a lesser degree leather and wool, carry a heavy environmental and ethical cost.

A clear definition, without the greenwashing

Sustainable fashion is one of those phrases that gets stretched until it means almost nothing. Brands use it freely, often on a single “eco” product line while the rest of the business carries on as before. So let us be precise. Sustainable fashion is clothing produced and consumed in a way that minimises harm across its whole life, from the raw material to the moment it is thrown away – and that includes people, planet and animals.

That last part is often left out. Much of the sustainability conversation focuses on carbon and water while quietly ignoring the animals whose skins, fur and fleece become clothing. A complete view of sustainable fashion has to hold all three together.

How big is fashion’s footprint? The honest numbers

Fashion’s impact is often exaggerated with dramatic but unsourced claims, so here are figures that stand up. The United Nations Environment Programme estimates the textile industry produces between 2% and 8% of global greenhouse-gas emissions. Careful analysts put the carbon figure at around 2% to 4%, which is still comparable to the combined emissions of France, Germany and the United Kingdom.

It is worth correcting two myths, because credibility matters. Fashion is often called “the second most polluting industry,” a claim with no reliable source behind it. And the frequently repeated line that fashion causes 20% of global water pollution is not accurate either. The truth is serious enough without exaggeration: fashion is a major user of water, a significant emitter and a large producer of waste, with less than 1% of clothing recycled back into new clothing.

The part most guides miss: animals in fashion

Here is a fact that reframes the whole issue. Although animal fibres like wool and leather make up only around 3% to 5% of global fashion production, one analysis estimates they may be responsible for 70% to 80% of the industry’s methane emissions over a twenty-year period. In other words, a small slice of what we wear carries a hugely outsized climate cost, and it is the animal-derived slice.

Fur is the starkest case. Independent life-cycle research found that producing mink fur was worse than cotton, polyester, wool and acrylic on 17 of 18 environmental measures, driven by the vast amount of feed the animals need and the chemicals used to preserve pelts (CE Delft). So the animal question is not separate from the sustainability question. It sits right at the centre of it.

Materials compared

No material is perfect, and honest comparison beats slogans. Here is a rough guide to the main options and their trade-offs.

What actually makes a wardrobe sustainable

If the material tables feel like a lot, here is the reassuring truth. The single most sustainable thing you can do is not a clever material swap. It is to buy less and keep clothes longer. A garment worn for years, whatever it is made of, almost always beats a “sustainable” purchase worn twice. From there, a few principles help.

Choose animal free where you can. Skipping fur entirely, and reducing leather and wool, cuts both suffering and the outsized methane footprint of animal fibres.

Favour recycled and certified fibres. Recycled cotton and polyester and credible certification, lower the impact of what you do buy.

Care for what you own. Washing cooler and less often, repairing and passing clothes on, all extend a garments life, which is where the real savings sit.

Why Asia is central, and where ACTAsia comes in

Asia produces a large share of the world’s clothing and is a fast growing market for it, so the choices made there shape global fashion. That is why ACTAsia’s Compassion in Fashion programme works across the region, helping designers, students and shoppers understand the true cost of materials and to choose kinder alternatives. Change here does not come from shame. It comes from knowledge and ActAsia’s analysis finds a pound or dollar goes around three times as far in Asia as in the West (Grant C., 2024).

Frequently asked questions

What is sustainable fashion in simple terms?

Sustainable fashion means making and buying clothes in ways that reduce harm to the planet, workers and animals, across the whole life of a garment. It covers materials, emissions, water, waste and labour – a complete view includes animal welfare too.

How much pollution does the fashion industry cause?

The UN Environment Programme estimates textiles produce between 2% and 8% of global greenhouse gas emissions, with careful analysts citing around 2% to 4% for carbon. Fashion is also a major user of water and producer of waste, with under 1% of clothing recycled into new clothing.

Is leather or fur more sustainable than synthetics?

Not usually. Animal fibres like wool and leather are a small share of production but a large share of fashion’s methane emissions and fur scores worse than cotton, polyester, wool and acrylic on most environmental measures. Reducing animal materials and buying less overall does more than any single swap.

What is the most sustainable material for clothes?

There is no perfect material. Recycled and certified fibres are lower impact, but the biggest gain comes from buying less and keeping clothes longer. A garment worn for years almost always beats a new “sustainable” item worn only a few times.

How can I make my wardrobe more sustainable?

Buy less and keep clothes longer, avoid fur and reduce leather and wool, choose recycled or certified fibres where you can, and care for what you own by washing cooler, repairing and passing items on. Small, consistent habits matter more than one perfect purchase.

Education is urgent, and behaviour is learnt. Sustainable fashion is not about guilt or perfect choices. It is about understanding what our clothes really cost and choosing a little more kindly. Support cruelty free fashion education.