Wool is fibre sheared from a sheep's fleece, or combed from a goat for mohair and cashmere, and that is the fibre's legal definition. Shearing alone does not kill the sheep, but the wool trade runs on the same farms that supply the meat trade.
Made fromSheared fleece (hair) of a sheep
Legal definitionFibre from a sheep, lamb, Angora or Cashmere goat (US law)
Vegan swapsAcrylic, organic cotton, Tencel
VerdictNot vegan
Where it hides
Jumpers, coats and suiting labelled "100% wool" or "pure new wool"
Carpets, felt and upholstery fabric
Wool-blend socks and thermal base layers
Dryer balls and insulation sold simply as "natural fibre"
Lanolin, the wool grease washed out of raw fleece, in separate cosmetics
What it is
Wool is fibre sheared from a sheep once a year, and the word has a precise legal meaning rather than a loose one. US labelling law defines it as:
Primary source 01 / 01
the fiber from the fleece of the sheep or lamb or hair of the Angora or Cashmere goat
So on a label, wool is never a stand-in for a plant fibre: it is animal hair by definition, whichever animal grew it. Shearing itself does not kill a sheep, and a healthy one can be sheared every year for its working life.
Why it still isn't vegan
The complication sits around the shearing, not in it. Wool sheep are bred and culled within the same farming system that supplies lamb and mutton, so a sheep's wool years usually end at the slaughterhouse rather than a retirement field. Mulesing, cutting strips of skin from a lamb's rear without anaesthetic to stop a parasitic fly from laying eggs in the folds, remains legal and common in Australia, which supplies most of the world's fine wool. None of that is disclosed on a jumper's tag, and it is why wool as a material fails the vegan standard even though the act of shearing alone would not.
How to check the label
The fibre content tag required by US and EU law will say "wool" plainly whenever any is present, even in a blend, so scanning it is the fastest check. A "Responsible Wool Standard" or "mulesing-free" claim is a welfare improvement, not a vegan one: the fleece is still taken from a farmed sheep. For an animal-free equivalent, look for acrylic, polyester fleece, organic cotton knits or Tencel/lyocell, sold plainly as such rather than under the marketing phrase "vegan wool", which has no fibre of its own.
CashmereCashmere is the fine undercoat combed or sheared from a cashmere goat each spring, and US law even sets a fibre-diameter limit for what may carry the name. It is wool's more exclusive cousin, not a different kind of material.
LeatherLeather is an animal's tanned skin or hide, almost always cattle, and US labelling rules say a product can only be called leather if it is made in all substantial parts of it. Plant and lab-grown alternatives exist, but they need a different name on the tag to be legal.
LanolinLanolin is wool grease from sheep. No sheep is killed for it, but it is an animal product all the same, and it is the quiet source of most vitamin D3 on the shelf.
Frequently asked
Does shearing a sheep hurt it?
Shearing itself is not supposed to hurt, and a healthy sheep needs it every year regardless of what happens to the wool afterwards. The vegan objection is to sheep being bred, farmed and eventually slaughtered for the wool and meat trade together, and to practices like mulesing, not to the act of cutting hair.
Is merino wool vegan?
No. Merino is a breed of sheep, not a different material, so merino wool is still sheared animal hair with the same issues as any other wool.
What is vegan wool made from?
Nothing from a sheep. "Vegan wool" is a marketing term for fabric that mimics wool's warmth and texture, usually acrylic, recycled polyester fleece, organic cotton or wood-pulp-based Tencel.
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