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To wash a wool jumper, follow that garment’s care label, choose a wool-safe detergent and arrange somewhere to dry it before you start. If home washing is allowed, the easy-to-miss step comes afterwards: a wet knit needs support, rather than a hanger taking its weight through the shoulders.
Picture taking your favourite jumper out at the start of autumn. There are no visible stains, but it has spent months folded away. Before filling the basin, decide whether it needs washing or simply airing. Woolmark’s care guidance notes that wool needs less frequent washing than some other fibres. There is no fixed number of wears that fits every garment; look at its actual condition.
Choose the method before you choose a programme
A wool percentage is not a set of washing instructions. Two similar-looking jumpers can have different care requirements. With blends, finishes, trims and other fibres also matter. Check the manufacturer’s care instructions. If the symbols are unfamiliar, use our guide to reading a clothing care label.
- Machine washable: use the permitted programme and temperature; the fabric’s name does not authorise every cycle.
- Hand wash only: follow that method, even if your washing machine offers a button called hand wash.
- Dry clean only: arrange the specified professional care.
- Instructions missing or unreadable: check the product information or ask its manufacturer before experimenting.
Take a photo of the label and of the jumper laid out. This is a practical reference, rather than a technical requirement. It helps you remember the shape and the instructions when you have several garments to deal with.
Get the drying space and detergent ready
Clear a surface where the whole jumper can rest without dangling over the edge. Have a clean, pale, lint-free towel ready. Preparing the space now saves you from improvising with a bathroom door or chair back when the garment is already wet.
Woolmark advises a mild, neutral detergent suitable for wool and advises against heavy-duty detergents, enzyme-containing products and bleaches. Follow the detergent’s dosage. Adding extra just in case does not change the garment’s care instructions. There is no need to add fabric softener to this routine.
For a machine-washable jumper, check the actual settings
Woolmark’s jumper-washing guide suggests turning it inside out or using a laundry bag and choosing the wool cycle when machine washing is permitted. Look at the programme’s actual settings: its name does not override the care label’s temperature limit.
Check the machine manual for that cycle’s load and options too. If it has no wool programme, Woolmark describes cold washing or a delicate cycle for machine-washable wool; confirm that this suits the garment. That alternative does not make a jumper marked hand wash only machine washable.
For hand washing, avoid twisting the knit
For suitable wool garments, Woolmark describes clean, lukewarm water at about 30°C, mild detergent, roughly ten minutes of soaking and thorough rinsing. Follow any stricter instruction on your jumper. Support the knit as you move it instead of scrubbing it like a cleaning cloth.
Avoid squeezing or wringing it aggressively to remove water, as the Merino sweater-care manual explains. Treat a stain according to what caused it and the fabric’s instructions; a general washing routine is not a universal stain-removal treatment.
Dry flat and gently restore its shape
Woolmark’s drying guidance recommends laying knitwear on a pale, lint-free towel or a suitable drying surface. Gently arrange the sleeves and body without pulling to add length. Avoid radiators, direct heat and direct sunlight. Hanging can stretch a wet knit under the weight of the water.
Choose somewhere you can leave it undisturbed. Before folding it, check the cuffs, neckline and thicker areas as well as the main body. There is no single drying time to promise: the jumper’s thickness and room conditions vary.
Three questions that often come up
Can it go in the dryer if it is machine washable?
One permission does not imply the other. Woolmark treats tumble-drying permission separately. Follow that symbol and the authorised setting. Without permission, keep to flat drying.
Will washing remove bobbles?
Bobbles need separate attention. Woolmark links pilling to friction and describes careful removal methods on a dry garment. Do not increase the wash intensity in an attempt to remove them.
How should I put it away?
Woolmark’s storage advice is to fold knitwear rather than hang it. If you are putting seasonal clothes away, our wardrobe-storage guide can help you organise a system you will actually use.
Sources for checking garment care
- Woolmark: washing wool jumpers
- Woolmark: wool detergents
- Woolmark: flat drying
- Woolmark: tumble-drying permission
Sources checked on 12 October 2026. Check the official sources for details that depend on your date, garment, footwear or app version.
