How to care for wool garments
- Jan 27
- 5 min read
Wool is one of those materials that rewards you for treating it well. A quality wool sweater can last decades with proper care, developing a softer hand feel over time rather than wearing out. But wool has a reputation for being fussy, and many people avoid it entirely or accidentally felt their favourite jumper in a hot wash.
The good news is that caring for wool isn't complicated once you understand what the fibre needs. In fact, wool requires less frequent washing than most fabrics, which makes it easier to maintain than you might think. This guide covers everything you need to know to keep your wool garments looking and feeling their best for years to come.
Understanding wool
Wool fibres have a unique structure that gives them remarkable properties but also makes them sensitive to certain conditions. Each fibre is covered in tiny overlapping scales, similar to roof tiles. These scales allow wool to repel water and resist odours naturally, but they're also responsible for wool's tendency to felt when exposed to heat, agitation, and moisture together.
The scales open when wool gets wet and warm. If the fibres are agitated in this state, the scales interlock permanently, causing the fabric to shrink and become dense. This is felting, and it's irreversible. Understanding this mechanism is key to caring for wool properly: you need to avoid combining heat, moisture, and agitation.
Wool also absorbs moisture vapour from the air, which is why it feels comfortable in both warm and cool conditions. This same property means wool garments benefit from airing out between wears rather than washing after every use.
For the full sustainability profile of wool, including its environmental impact and certifications to look for, see our complete guide to wool.
Washing
The most important thing to know about washing wool is that you probably don't need to do it as often as you think. Wool's natural structure resists odours and doesn't hold onto smells the way cotton or synthetics do. Many wool garments only need washing a few times per season, with airing between wears being sufficient for freshening up.
When you do need to wash, you have two good options: machine washing on a wool or delicate cycle, or hand washing. Both work well if you follow the right approach.
Temperature and cycle
Always use cold or cool water, no warmer than 30°C. The wool cycle on modern washing machines is designed to minimise agitation while keeping temperatures low. If your machine doesn't have a wool setting, use the delicate or hand wash cycle instead. The key is gentle movement and cool temperatures.
For hand washing, fill a basin with cool water, submerge the garment, and gently squeeze the water through the fabric. Avoid rubbing, wringing, or twisting, as these actions can cause felting and distort the shape.
Detergent
Use a detergent specifically formulated for wool, or a mild pH-neutral detergent. Standard laundry detergents are often too alkaline for wool and can damage the fibres over time. You don't need much—a small amount goes a long way with wool.
Avoid fabric softeners entirely. Wool has natural lanolin that keeps it soft, and fabric softeners can coat the fibres and reduce wool's natural properties.
Frequency
Aim to wash wool garments only when genuinely needed. Spot clean small marks with a damp cloth. Air garments overnight after wearing, ideally somewhere with good air circulation. You'll find that wool stays fresh far longer than you expect, often needing just two or three washes across a whole winter season.
Drying
Never tumble dry wool. The combination of heat and tumbling is a recipe for felting, and even a "low heat" setting can cause shrinkage.
After washing, gently squeeze out excess water without wringing or twisting. You can roll the garment in a clean towel and press to absorb more moisture. Then lay the garment flat on a dry towel or a mesh drying rack, reshaping it to its original dimensions while still damp.
This flat drying approach is essential for knitwear. Hanging a wet wool sweater will cause it to stretch out of shape as the weight of the water pulls the fibres down. Flat drying allows the garment to dry in its natural form.
Keep drying wool away from direct heat sources like radiators, and avoid direct sunlight, which can cause fading. A well-ventilated room at normal temperature is ideal. Depending on the weight of the garment, drying can take 24 to 48 hours.
Ironing and finishing
Most wool garments don't need ironing if you reshape them properly while damp and allow them to dry flat. The natural resilience of wool fibres means wrinkles often relax on their own when the garment is hung or worn.
If you do need to press wool, use a low temperature setting and always use a pressing cloth—a clean cotton cloth placed between the iron and the wool. This protects the surface from developing shine, which happens when wool fibres are compressed directly by heat.
Steam is your friend with wool. A handheld steamer can refresh garments and release wrinkles without the pressure of ironing. Hold the steamer a few centimetres from the fabric and let the steam do the work. This is also an effective way to freshen wool between washes.
Storage
How you store wool matters as much as how you wash it, particularly for seasonal items that spend months in the wardrobe.
For day-to-day storage between wears, fold knitwear rather than hanging it. Hanging causes shoulder bumps and stretching over time. Woven wool garments like blazers and coats can be hung on padded or wooden hangers that support the shoulders properly.
For long-term seasonal storage, ensure garments are clean before putting them away. Moths are attracted to the oils and residues on worn clothes, not to the wool itself. Store in breathable containers or cotton garment bags rather than plastic, which can trap moisture. Cedar blocks or lavender sachets provide natural moth deterrence without the harshness of mothballs.
Check stored wool periodically throughout the off-season. If you spot any signs of moth damage—small holes or loose fibres—address it immediately by washing the affected items and treating your storage area.
Repairs and longevity
Wool is one of the most repairable textiles. Small holes can be darned, and pilling can be removed to restore a garment's appearance.
Pilling is a natural occurrence with wool, especially in areas of friction like underarms and sides. Use a fabric comb or a sweater stone to gently remove pills. Electric fabric shavers work but require a careful hand to avoid cutting into the fabric.
For holes or worn areas, darning is a traditional repair technique that's worth learning. Visible mending has become fashionable, but invisible darning is also possible for those who prefer a seamless repair. Many dry cleaners and tailors offer professional darning services if you'd rather leave it to experts.
With proper care, a quality wool garment can last 20 years or more. When a wool item does eventually reach the end of its wearable life, remember that wool is biodegradable and compostable. Heavily worn wool can also be recycled into new yarn or used for insulation, though local recycling options vary.
Quick reference: wool care
Aspect | Recommendation |
|---|---|
Wash temperature | 30°C (cool) or cold |
Machine washable | Yes, wool cycle or hand wash |
Tumble dry | No — air dry flat |
Iron temperature | Low, with pressing cloth or steamer |
Storage | Fold knitwear; hang coats on padded hangers |
Wash frequency | Only when needed; air between wears |
Moth prevention | Store clean; use cedar or lavender |
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