Is Silk Vegan? Peace Silk, and What to Wear Instead
No. How silk is made, what peace silk changes and what it does not, the fabric names that hide silk on a label, and the alternatives that pass our gate, with their honest trade-offs.
The short answer
No. Silk is spun by an insect, so it is an animal material, and any brand that sells it carries our animal-materials tag under our standard. That includes "peace silk" and "ahimsa silk", which are gentler ways of producing the same fibre, and it includes recycled silk.
Silk is easy to miss because it rarely announces itself. It sits in the lining of a jacket, the knot of a tie, a scarf in a gift box or a set of pyjamas. The fibre name on the label is reliable. The fabric names around it often tell you nothing. This guide covers how silk is made, what peace silk does and does not change, where silk hides, and what to wear instead.
How silk is made
Almost all commercial silk comes from the domesticated silkworm, Bombyx mori, the caterpillar of a moth that has been bred for so long it no longer exists in the wild. The caterpillars are fed on mulberry leaves, which is why "mulberry silk" turns up on labels. Each one spins its cocoon from a single continuous thread, somewhere between 300 and 900 metres long.
If the moth were allowed to come out, it would break that thread. So in conventional production the cocoons are "stifled" first: heated with steam, hot air or strong sun to kill the pupa inside. The UN Food and Agriculture Organization's manual on silk reeling is plain about why. A newly emerged moth pierces the shell, which renders the cocoon useless for raw silk. Steam kills the pupae within 30 minutes. The cocoons are then softened in hot water and the filament is unwound, or reeled, onto spools.
World output was about 91,000 tonnes of raw silk in 2022, and China and India between them produced about 95 per cent of it.
Peace silk, ahimsa silk and eri
Peace silk, often sold as ahimsa silk, lets the moth emerge before the cocoon is used. The thread is then broken, so it cannot be reeled into one long filament. Instead the fibres are spun into yarn, much as cotton or wool is, which gives the fabric its softer, slightly uneven look.
That is a real difference, and it is still not animal-free.
- The moths are still bred for it. Domestic silk moths cannot fly and do not feed as adults. Peace silk spares the pupa from the steam, but the breeding, mating and egg-laying that keep the supply going are the same as for conventional silk. Beauty Without Cruelty India, which campaigns against all silk, argues that the emerged moths, unable to fly, simply die, and that the cycle is no different in kind.
- The name is hard to check. Eri silk, from a different domesticated silkworm reared mainly in north-east India, is often marketed as peace silk. But Mississippi State University's entomology museum notes that in eri production, large or small, the moths are not normally allowed to emerge, apart from those kept for breeding. The pupae are removed and eaten or used for feed. "Eri" on a label does not tell you the moth lived.
- It is scarce. Stella McCartney is the best-known brand to have used peace silk. When we checked its sustainability pages in October 2026, it said it had found it "difficult to source the quality and quantity of Peace Silk we need", and that the majority of its silk is either organic or comes from traditional sources in Como, Italy. It named no certification for either.
Why our gate still counts it
Our materials gate lists nineteen animal-derived materials, and silk is one of them. We do not grade animal materials by how well the animal was treated, for the reasons we set out in where fashion's animal materials come from. The same logic applies to "responsible" wool, which we cover in our guide to wool.
So a brand selling peace silk, organic silk or recycled silk carries the tag, is listed after every brand that passes, and cannot earn the Good badge. Its animal-free pieces stay on the site with the tag beside them, so you can still choose them knowing what the range includes.
Where silk hides
UK labels must give the fibre composition using the legal fibre names, and "silk" is reserved for fibre obtained exclusively from silk-secreting insects. So the composition line is the part to trust. The trouble is the vocabulary around it.
- Satin and charmeuse are weaves, not fibres. Satin can be woven from silk, polyester or nylon, and charmeuse is a lightweight satin weave. Most satin on the high street is polyester. Some is not.
- Habotai (also spelt habutai) is a soft, plain-weave fabric made from silk. You will meet it in scarves and linings.
- "Mulberry silk" is ordinary Bombyx mori silk. The word mulberry describes the caterpillar's food, not a gentler process.
- Blends. A shirt can be 10 per cent silk, and "silk-cashmere" knitwear is two animal fibres at once.
The places to look are fairly predictable: linings in tailoring and coats, ties and pocket squares, scarves, sleepwear and lingerie, occasionwear, and the silk pillowcases and scrunchies sold for hair and skin. Our guide to reading a clothing label covers the other trade names that quietly mean animal.
Sometimes the copy itself is the problem. We held back some of PatPat's children's rompers because the listing described them as "95% Lyocell natural silk", which does not tell you whether there is silk in them or not. A piece goes on the site when its composition is clear.
What to wear instead
Nothing reproduces silk exactly, but several fibres come close in drape and feel. None of them is free of trade-offs, and we would rather you knew them.
| Instead of silk | What it is like | The trade-off |
|---|---|---|
| Lyocell (TENCEL) | Smooth, cool and fluid, with a soft sheen | Made from wood pulp. Lenzing's closed-loop process recovers more than 99 per cent of its solvent, but lyocell from other makers may not say the same |
| Cupro | The classic lining fabric: silky, breathable, takes dye well | Made from cotton linter, the fuzz left on cotton seeds, using copper and ammonia. Asahi Kasei, which makes Bemberg cupro, says it recovers and reuses both |
| Viscose and modal | Cheap, soft and drapey | Conventional viscose relies on carbon disulphide, a toxic chemical, and the worst factories have been linked to serious pollution |
| Recycled polyester satin | Durable, washable, the most silk-like shine for the money | It is plastic, and it sheds microfibres in the wash |
Being animal-free and being low impact are two separate claims, and we score them separately, with sustainability on its own badge. A polyester satin blouse passes our materials gate. That says nothing about its footprint.
For nightwear, Zed Sleep makes pyjamas in 89 per cent TENCEL Micro Modal and 11 per cent elastane, with no silk or wool. For occasionwear, TFNC London uses polyester for its satins and velvets, though it publishes so little that it scores 0. For a scarf, Thought's printed bamboo viscose scarf at £28 says exactly what it is, though Thought as a brand is tagged for wool.
Where silk turns up in brands we rate
These brands carry the animal-materials tag, and silk is part of the reason. Scores are as of October 2026; the brand pages are always the current version.
- Stella McCartney (45). Has never used leather, fur, feathers or skins, and says so. Uses wool and silk, including the peace silk described above.
- Gini London (15). Sells a 100 per cent silk dress alongside polyester faux-fur hoods and knits with 6 per cent wool.
- Peper Harow (15). Mostly cotton socks, but also silk ties, cashmere-blend socks and wool boot socks.
Before you buy
- Read the composition, not the fabric name. Satin and charmeuse describe how a fabric is woven, not what it is made of.
- Check the lining separately. It has its own line on the label.
- Treat "peace silk", "ahimsa silk", "eri", "organic silk" and "recycled silk" as silk. All of them are.
- For gifts, check scarves, ties and sleepwear sets, which are where silk most often arrives unannounced.
- Look the brand up on our brands list to see what else its range includes.
If you are replacing things gradually, our guide to building a vegan wardrobe suggests an order that does not mean starting again.