Is superwash merino wool safe for your baby?

Merinowool is a wonderful material, especially for babies. But that does not mean every merinowool is automatically the same. The questions now being asked about superwash and mulesing are justified – and we are happy to answer them.

Following reports and episodes of Keuringsdienst van Waarde about merinowool, we receive many questions about topics that consumers usually have little insight into: how wool is processed, where wool comes from, what a claim like "mulesing-free" exactly means, and what certificates do and do not prove. These are good questions, and we think it is only logical that parents ask them. Anyone buying a romper or blanket for a newborn deserves to know what has happened to the material.

In this blog, we explain what superwash and mulesing are, how they relate to each other, what certificates do and do not say, and what we at Moalie specifically do.

What is superwash?

Wool naturally has scales on the fiber. Through heat, moisture, and friction – exactly what happens in a washing machine – these scales can hook into each other. That is why wool can shrink or felt.

Superwash is a treatment that makes wool more washable and reduces shrinkage and felting. The best-known method is the chlorine-Hercosett process. In this, the wool fiber is first treated to reduce or modify the scale structure. Then a polymer or resin is used to make the fiber smoother.

There is debate about the last point. Critical sources often talk about a plastic or polymer layer on the fiber. Wool industry sources argue that it is not a loose plastic coating that simply comes off the fiber. We do not think it is our place to settle that debate in one sentence. What is most important to us is: which process was used, how is wastewater treated, and how transparent is the supplier about this?

Is superwash bad?

That cannot be answered with a simple yes or no, because there are actually four different questions behind it: is it safe for baby skin, what is the environmental impact during production, does the wool change because of it, and how transparent is the supply chain about it?

Superwash does not automatically mean a product is unsafe for a baby. The biggest concerns are mainly about the processing: the use of chlorine, polymers, water, wastewater treatment, and the monitoring of these.

A few nuances that come with it. Some superwash processes can be environmentally harmful if wastewater is not properly treated. Modern facilities can purify wastewater, but that requires monitoring and transparency. There are also alternatives, such as enzymatic or plasma treatments, but these are not yet the standard. And not all machine-washable wool is the same: the differences between processes and factories are significant.

So when you hear "this wool is superwash treated," you still don’t know whether that was done carefully or carelessly. You need to ask further questions.

Why is this relevant for baby products?

Parents often choose merino wool for good reasons. It is soft, breathable, and temperature-regulating. It can absorb moisture without feeling immediately clammy, needs less frequent washing, and can therefore be very suitable for sensitive baby skin.

But precisely because baby products are worn close to the skin, we believe it’s natural for parents to want to know what happened to the material before it became a bodysuit, hat, blanket, or jumpsuit. A newborn cannot choose for themselves. That only increases the responsibility of parents – and of us as a brand.

What is mulesing?

Mulesing is a procedure where skin around the tail of merino sheep is removed to prevent flystrike (myiasis): a condition where flies lay eggs in moist skin folds. Mulesing mainly occurs with Australian merino wool and is a serious animal welfare issue.

Important to know: mulesing is separate from superwash. One concerns animal welfare for the sheep, the other the processing of the wool fiber. Yet they belong in the same discussion because both show how important transparency in the wool supply chain is – from farm to final product.

Our position: we buy our merino wool from suppliers who specify mulesing-free wool and support this with declarations or certificates. Where possible, we work with certifications like RWS (Responsible Wool Standard), because they look beyond just a single claim.

Certificates: what do they say and not say?

Certificates help, but they do not replace critical questions to suppliers. No certificate proves everything. That’s why we list the most important ones, along with their limitations.

The core: OEKO-TEX® Standard 100 says something about tested fabrics and skin safety, but not automatically about animal welfare or the full environmental impact of the chain. RWS focuses on animal welfare, land management, and traceability, but does not automatically cover all dyeing processes or possible superwash treatments. Certificates are puzzle pieces – not the whole picture.

What does Moalie do specifically?

We make baby products from merino wool and merino/cashmere. You can’t just say "it’s certified" and then remain silent. This is what we do.

We actively ask our suppliers about the origin of the wool. We ask if the wool is mulesing-free and how that is substantiated: with which declaration or certificate. We ask which certificates are available and – just as importantly – what exactly they cover: the fiber, the yarn, the fabric, the production site, or the final product. That difference is often hidden in marketing, but it matters a lot.

We want to know if wool is superwash treated. And if so, which process was used and what controls are in place for wastewater and chemical use.

For our collection, we can be specific about that. For our 2 pointelle blankets – the Merino Pointelle baby blanket Apricot and the Merino Pointelle baby blanket Seashell – the only products in our collection using washable merino wool, our manufacturer indicates that no classic chlorine-Hercosett treatment has been applied. According to the information we have received, it involves an enzymatic treatment to reduce shrinkage and felting. Our other merino products are not superwash treated.

Precisely because consumers are currently critical of merino wool, we do not want to hide this in general terms. Not every merino product is the same. That is why we increasingly specify per product group whether wool is untreated, washable, shrink-resistant treated, or certified.

For our current wool qualities, we have, among others, RWS and GOTS documentation from our manufacturer. These certificates are not something you have to take from us: they are verifiable via the public databases of Textile Exchange and GOTS. OEKO-TEX® labels can be checked via the OEKO-TEX® label check. Important: certificates can vary per material, product group, or batch. The existence of a certificate does not automatically mean that every product falls under it. Upon request, we can explain which certificates belong to which product group.

We do not use certificates as a marketing trick, but as part of due diligence. And we are honest about the fact that textile supply chains are complex. Therefore, we do not write: "We have full control over the entire chain." That would not be true – not for us, and frankly for almost no brand. What we can say: we want to increasingly show what we do know, what is demonstrable, and where we further question suppliers.

Frequently Asked Questions

Is superwash merino wool unsafe for my baby?

Not automatically. The main questions concern the production process, wastewater, and transparency. For skin safety, we look at certifications such as OEKO-TEX® Standard 100.

Does Moalie use superwash wool?

At Moalie, this does not apply to our entire merino collection. Only our 2 pointelle blankets – the Apricot and the Seashell – are made from washable merino wool. For these blankets, our manufacturer indicates that no classic chlorine-Hercosett treatment has been used, but an enzymatic treatment to reduce shrinkage and felting.

Our other merino products are not treated with superwash. Because terms like "superwash," "machine washable," and "shrink-resistant treated" are sometimes used interchangeably in practice, we find it important to clearly specify for each product what does and does not apply.

Is merino wool naturally suitable for babies?

Yes, merino wool can be very suitable for baby products due to its softness, breathability, and temperature regulation. But quality, origin, and processing make a big difference.

What is the difference between mulesing and superwash?

Mulesing concerns animal welfare in sheep. Superwash concerns a treatment of the wool fiber to make wool more washable. They are two different topics that both require transparency.

Is mulesing-free the same as sustainable?

No. Mulesing-free refers to one important aspect of animal welfare, but not automatically to dyeing processes, working conditions, skin safety, or the full environmental impact.

What does OEKO-TEX® say?

OEKO-TEX® Standard 100 tests textiles for an extensive list of substances that can be harmful to health. It does not automatically say anything about animal welfare or the origin of the wool.

What does RWS say?

RWS focuses on animal welfare, land management, and supply chain traceability within the standard. It is especially relevant for the origin of the wool and how sheep and land are treated.

Why doesn’t Moalie simply say “everything is 100% sustainable”?

Because in textiles, honesty is almost never guaranteed. We prefer transparency: what do we know, what can we substantiate, and where do we remain critical?

In conclusion

We still believe in merino wool as a beautiful material for babies. But we also believe that beautiful materials deserve honest questions.

This blog is therefore not an endpoint. We use parents’ questions precisely to challenge our suppliers more sharply and to make clearer what we do know, what is demonstrable, and where we continue to ask questions. Do you have a question that is not answered here? Feel free to ask. Critical parents make us a better brand.

Transparency: for our current wool qualities, we work among others with Tongxiang Zhongqi Textile Co., Ltd. Available documentation includes an RWS scope certificate (CU1029656MUL-2024-00032449) and a GOTS certification (ETK-00042917-GOTS-2412). Certificates may vary per material, product group, or batch; upon request, we clarify which certificates belong to which product group.

Sources

• Textile Exchange – Responsible Wool Standard
• Global Organic Textile Standard – GOTS Public Database
• OEKO-TEX® – STANDARD 100 and Label Check
• The Woolmark Company – information on machine-washable wool
• KRO-NCRV / Keuringsdienst van Waarde – merino wool and mulesing
• amfori BSCI – social audits
• Sedex – ethical supply chain information and audits