What are the common misunderstandings about caring for hats?
This answer is a draft. It stays unpublished until legal review and source verification are complete.
"Can I wash a hat, and how do I stop it losing its shape?" is asked in every country. In Japan hats are worn a great deal, against strong summer UV and the winter cold, so tips on sweat stains and storage are widely shared. Here is what people here go by.
Guide by material
| Material | Washable? | Method | Caution |
|---|---|---|---|
| Cotton or polyester (caps) | Hand-wash if the label allows | Press-wash in neutral detergent; do not put the brim in the washing machine | The brim's core (card or plastic) deforms |
| Straw or raffia | No | Remove dust with a dry cloth or soft brush. Dab sweat with a firmly wrung cloth | Wet, it deforms and moulds |
| Felt (wool) | No | Brush dust off along the nap. Some people reshape with steam | Water shrinks it and leaves stains |
| Knitted beanie | Depends on the label | Same as washing knitwear (press-wash, dry flat) | Stretching |
| Leather or synthetic leather | No | Wipe. Cream for real leather | Hydrolysis (synthetic leather) |
- Hats also fall under the Household Goods Quality Labelling Act (as textile products), so they carry a material label and a care label. Look at the label on the sweatband (the tape inside the crown).
- Sweat stains are salt and skin oil. Left alone they yellow the fabric or leave a white ring. When you get home, dab the band with a firmly wrung cloth and dry in the shade.
[Verify] Check the scope of the labelling requirement in the Consumer Affairs Agency's "Textile Products Quality Labelling Regulations".
Misunderstanding 1｜A cap can go in the washing machine whole
The brim's core deforms or breaks. Hand-wash, and do not soak the brim too much. Some people use a cap-washing cage (a frame that holds the hat's shape).
Misunderstanding 2｜The white ring is dirt and will rub off
It is sweat salt that has dried and risen to the surface. Rubbing damages the fabric. Press with a damp towel to dissolve the salt out, then dry in the shade.
Misunderstanding 3｜Hang it up to dry
A wet hat loses its shape under its own weight. The standard method is to set it over a bowl or a rolled towel to form the shape, and dry in the shade.
Misunderstanding 4｜A straw hat is only for summer, so it needs no care
Sweat and damp bring mould. At the end of the season, remove dust, dab the sweat areas, and store in a breathable box with a desiccant.
Misunderstanding 5｜Felt hats stand up to rain
They shrink when wet and stains remain. If one gets wet, press with a towel, reshape it and let it dry naturally. A hairdryer causes shrinkage.
---
Sources
- Consumer Affairs Agency, "Household Goods Quality Labelling Act — Textile Products Quality Labelling Regulations" [家庭用品品質表示法 繊維製品品質表示規程]
https://www.caa.go.jp/policies/policy/representation/household_goods/guide/fiber/
- Consumer Affairs Agency, "Care labelling (from 20 August 2024)" [洗濯表示（令和6年8月20日以降）]
https://www.caa.go.jp/policies/policy/representation/household_goods/guide/wash_02.html
- Ministry of the Environment, "UV Environmental Health Manual 2020" [紫外線環境保健マニュアル2020] (hats as UV protection)
https://www.env.go.jp/chemi/uv/uv_manual.html
⚠️ 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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