Can I wash a cashmere sweater or scarf at home? How do I make it last?
This answer is a draft. It stays unpublished until legal review and source verification are complete.
Cashmere is finer, lighter and warmer than ordinary wool. Because it is expensive, it also raises the most questions: "Should I send it to the cleaner?", "It has pilled", "It went fuzzy after one season". Here is a guide to care and storage, based on how the fibre behaves, with the Japanese care label and shop terms you will need.
Cashmere basics and care guide
| Item | Details |
|---|---|
| Fibre fineness | 14–16 μm (wool is generally 20 μm or more). Finer means softer, but the fibres break under friction and become pills and fuzz |
| Yield | One cashmere goat gives 150–200 g of down a year. One sweater is described as needing 3–4 goats' worth, which is why it costs so much |
| Washing (if the label allows hand-washing) | Lukewarm water at 30°C or below, a neutral delicates detergent, press-wash for 1–2 minutes. Do not knead or rub |
| Rinsing and spinning | Rinse twice; machine spin for about 30 seconds, or press out water in a towel |
| Drying | Dry flat (a hanger stretches it). In the shade, somewhere airy. No hairdryer, no tumble dryer |
| Label says "do not wash at home" | Take it to a cleaner. Check the label for whether dry cleaning or wet cleaning is permitted |
| Resting | Do not wear on consecutive days. After a day's wear, rest it 1–2 days so the fibres recover |
| Pilling | Cut pills off at the base with scissors, or use a fabric shaver lightly. Do not pull |
- Brushing after wearing: use a clothes brush (洋服ブラシ) with boar or horse bristles, following the nap from top to bottom. It lifts dust, untangles knotted fibres and helps prevent pilling.
- Storage: off-season, always wash first (skin oils and food traces attract insects). Store folded, with a moth repellent (防虫剤, bōchūzai, sold at drugstores and 100-yen shops). Hanging stretches the shoulders. Cashmere is one of the materials most often attacked by clothes moths and carpet beetles.
- Fibre-content labels: under Japan's Household Goods Quality Labelling Act, cashmere is shown as "wool (cashmere)" (毛（カシミヤ）). Where the content is under 5%, use of the word "cashmere" on the label is restricted. The National Consumer Affairs Center of Japan has in the past published cases where products labelled "Cashmere 100" (all-cashmere) were found to fall short of that content.
- Yellowing of white cashmere is oxidised skin oil and sweat. Wash soon after wearing to prevent it.
[Verify] Check the fibre diameter, the yield per goat and the fibre-content labelling rules against the latest industry documents and legislation.
Misunderstanding 1｜Cashmere cannot be washed at home
If the label shows the hand-wash symbol, it can. Storing it unwashed for months is in fact a bigger cause of insect damage and yellowing. If the label forbids washing, use a cleaner.
Misunderstanding 2｜With a delicates detergent I can use the normal machine cycle
Cashmere is weak against friction; a normal cycle causes pilling, shrinkage and felting. Hand-wash, or use the machine's "hand-wash" or "dry" cycle in a laundry net with a short spin.
Misunderstanding 3｜Pull the pills off
That pulls out the surrounding fibres too and thins the fabric. Snip them at the base with small scissors, or use a fabric shaver lightly.
Misunderstanding 4｜Drying on a hanger keeps the shape
A wet knit stretches at the shoulders and hem under its own weight on a hanger. Use a flat drying net, or shape it on a bath towel.
Misunderstanding 5｜Expensive cashmere is tough, so I can wear it all season long
The finer the fibre, the weaker it is against friction, and daily wear gives it no time to recover. Resting it and brushing it changes how good it looks for years.
---
Sources
- Consumer Affairs Agency (消費者庁), "Household Goods Quality Labelling Act: Textile Goods Quality Labelling Regulations" (cashmere labelling)
https://www.caa.go.jp/policies/policy/representation/household_goods/guide/fiber/
- Consumer Affairs Agency, "The new care labels (JIS L0001)"
https://www.caa.go.jp/policies/policy/representation/household_goods/laundry_symbols/
- National Consumer Affairs Center of Japan (独立行政法人国民生活センター), "Test results on cashmere fibre content"
https://www.kokusen.go.jp/
⚠️ Editorial note: the source URLs above were identified by search. Our working environment cannot reach go.jp domains, so the contents have not been checked against the text. Verify every source before publication and record who checked it and when.
About this article
What we share here are ideas and everyday practices passed down among people living in Japan, together with general information drawn from public sources. They are not official recommendations, and they are not professional instruction. Practices vary between households and regions.
This is general information. Results vary from person to person and depend on your own conditions and surroundings.
Please decide for yourself, using your own judgement, whether any of this suits your situation. We cannot accept responsibility for any damage, loss or injury arising from following this article.
Follow the care label and the maker's instructions for any garment, shoe or bag. For expensive or sentimental items, ask a specialist cleaner or repairer.
Sources
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