How to wash merino wool baby clothes – and keep them soft
Merino wool baby clothes are an investment — and with the right care, they last for years. As a neonatal nurse, I'm regularly asked how to wash merino wool without it shrinking or losing that beautiful softness. In this guide I'll share my practical washing advice, including tips for stains, pilling, and how to keep merino wool fresh without washing it constantly.
What is merino wool and why is it ideal for baby clothes?
Merino wool comes from merino sheep and is known for its fine, soft fibre structure. It is far less scratchy than regular wool, making it perfect for a baby's sensitive skin.
Merino wool is also hypoallergenic, temperature-regulating (warm in winter, cool in summer), breathable and moisture-wicking, and durable and shape-retaining. This makes merino wool clothing ideal for everyday use, all year round.
The self-cleaning effect: why you rarely need to wash merino wool
This surprises many parents: merino wool largely cleans itself, thanks to its unique fibre structure. The natural lanolin content makes the fabric antibacterial and odour-resistant, odours are absorbed much more slowly than in cotton or synthetic fabrics, and dirt is pushed to the surface — meaning airing out is often enough.
Does your merino wool item smell slightly stale? Hang it outside or in a humid, well-ventilated bathroom. The fibres refresh themselves without any washing needed.
Scent and comfort: an extra benefit for babies
Scent plays an important role in baby products. Wear a Snuggle or cardigan close to your body for a few hours before giving it to your baby. The merino wool will absorb your scent — which gives your baby reassurance and supports bonding and comfort, especially in unfamiliar situations like falling asleep independently.
When and how to wash merino wool
Sometimes washing is unavoidable. For stains or accidents, wash merino wool carefully using one of these methods.
Hand washing (recommended)
Use lukewarm water of maximum 30°C and a mild wool detergent. Gently soak — do not rub or wring. Rinse thoroughly and lay flat to dry away from direct sunlight.
Machine washing (possible, but at your own risk)
Use the wool cycle at a maximum of 30°C with wool detergent — no fabric softener. Place the item in a laundry bag and wash inside out. Use a maximum spin speed of 600–800 rpm and do not wash with other items. Friction from other garments is the most common cause of shrinkage.
Treating and preventing stains
Stains are almost unavoidable with a baby, but you can manage them well. Treat stains immediately and locally with a stain remover cloth — the sooner, the better. Prevent stains by placing a bib or muslin cloth under your baby's head during feeding or sleeping. This keeps your merino wool clothing beautiful for longer and means less washing.
Pilling: completely normal
You may have noticed small bobbles or fluff on your merino wool clothing. Don't worry — this is completely normal. Merino wool is made from fine natural fibres that can pill, especially in the beginning, due to friction during wearing or washing. This does not affect the quality or softness of the fabric at all.
Use a wool comb to gently remove the bobbles from the fabric. Your clothing will look like new again, and regular use prevents the pilling from spreading further.
What if your merino wool has shrunk?
Merino wool can shrink if handled incorrectly. The scales on the fibres close up and air escapes from the fibre. The most common causes are washing at too high a temperature, too high a spin speed, and the use of fabric softener.
If you notice a garment has shrunk, try gently stretching it back into shape while it is still damp. Then lay it flat to dry. Unfortunately, significant shrinkage is often not fully reversible — so prevention is key.
Drying merino wool correctly
Never tumble dry merino wool. Lay it flat on a towel and avoid direct sunlight or a heat source. Place the garment in its original shape to prevent stretching. This keeps your clothing beautifully shaped and soft to the touch.
Long-term care and storage
Beyond washing, good care is important for a long lifespan. Air merino wool regularly to keep it fresh without washing. Store it flat — hanging on a clothes hanger causes stretching over time. Check garments occasionally for wear and repair small holes before they grow larger. For more care tips, visit our wool care guide.
Frequently asked questions about washing merino wool
How often should I wash merino wool baby clothes? Much less often than you might think. Thanks to the antibacterial properties of lanolin, merino wool stays naturally fresh. Airing out is usually enough — washing is only necessary for visible stains or after heavy use.
Can merino wool go in the washing machine? Yes, but with care and at your own risk. Use the wool cycle at a maximum of 30°C, wool detergent, a laundry bag, and a maximum spin speed of 600–800 rpm. Do not wash with other garments — friction is the main cause of shrinkage.
Which detergent should I use for merino wool? Always use a mild wool detergent. No regular detergent and no fabric softener — both damage the wool fibre and can cause shrinkage.
My merino wool has shrunk. What now? Try gently stretching the garment back into shape while it is still damp. Then lay it flat on a towel to dry. Significant shrinkage is unfortunately often not fully reversible, so prevention is the most important thing.
What are those small bobbles on my merino wool clothing? That is pilling — completely normal with natural fibres, especially at first. It says nothing about the quality. With a wool comb you can easily remove the bobbles and your clothing will look as good as new.