Superwash Wool – Blessing or Curse?

22/07/2025

What it really means and when it's worth using.

At first glance, the words "Superwash" or "machine-washable" sound like every crafter's dream: knit, wear, and toss it in the washing machine. But behind the convenience lies a process that's not without its controversy – especially for environmentally conscious makers.


🧪 What is "Superwash" Wool?

Superwash is a treatment applied to wool to prevent felting during washing. Natural wool has microscopic scales that latch onto each other when exposed to heat and movement – that's what causes felting. The Superwash process removes or smooths these scales:

  • Chlorine treatment: the fiber surface is chemically altered

  • Polymer coating: a thin layer of resin is applied to "seal" the fiber

The result? A soft, elastic yarn that can withstand gentle machine washing without shrinking or felting.

✅ Advantages of Superwash Wool

  • Machine washable – ideal for everyday items

  • Keeps its shape – less shrinkage or felting over time

  • Perfect for gifting – no special care instructions needed

  • Forgiving to work with – great for beginners, fewer felting issues

⚠️ Disadvantages & Controversies

  • More slippery – stitches can slip off the needles more easily

  • Less memory – it may lose springiness or structure, especially in lacework

  • Different texture – some crafters find Superwash yarns too slick or less "woolly"

  • Environmental impact – chlorine and resin treatments are not eco-friendly and can harm waterways

🌿 Eco-Friendly Alternatives? 

Yes! Several brands now offer chlorine-free Superwash options or plant-based blends that combine washability with sustainability:

  • Enzyme-treated Superwash – gentler and more eco-conscious

  • Cotton or bamboo blends – for natural softness and breathability

  • Recycled fiber mixes – lower environmental impact

💡 Examples:

  • Lana Grossa "Cool Wool" – machine-washable merino, soft and sleek

  • Lang Yarns "Merino+" – gentle to skin, still Superwash

  • Pro Lana "Baby Milk" – with added milk protein for extra softness

🧼 When is Superwash a Good Choice? 

✅ Use Superwash If...

  • You knit baby clothes 
  • You make socks or basics 
  • Your project needs frequent washing 
  • The recipient doesn't handwash 

⚠️ Choose Natural Wool If...

  • You prioritize eco values 
  • You want more structure 
  • You're working lace or cables 
  • You prefer more "grip" while knitting  


✨ Conclusion: Practical – with Awareness

Superwash yarns definitely have their place. They're practical, beginner-friendly, and useful for everyday wearables. But if sustainability matters to you, look for chlorine-free options, eco-fiber blends, or support brands working toward greener production methods.

What's your opinion on Superwash yarn? Do you use it or avoid it? 

Let's talk about it in the Facebook group or in the comments below!

#strickenimtrend #superwash #yarncare #knitgreen #machinewashablewool #sustainableknitting #fiberfacts

What's your thoughts on this? Team "Superwash" or not?

Yours,
Kathrin ☀️🧶