Superwash vs Non-Superwash Wool: What’s the Difference and Which Should You Choose?

If you’ve ever found yourself staring at yarn labels wondering what 'superwash' really means, you’re not alone. One of the most common questions about wool we get from customers at Fancy Yarns Australia is "should I use superwash or non-superwash wool for my project?"

Let’s dive into superwash vs non-superwash wool and explore the differences, the benefits of each and what you might want to consider when choosing between the two.

What is Superwash Wool?

Superwash wool is wool that has been treated to make it machine washable. Normally, untreated wool has microscopic scales that can interlock and cause felting when agitated in warm water. Superwash treatment either smooths down these scales or removes them entirely using two main processes:

1. Chlorine Treatment: A process where the wool is treated with chlorine to dull or remove the scales, then coated with a polymer resin to smooth the fibres.

2. Polymer Coating: Some superwash yarns are simply coated with a resin without chlorine treatment.

This treatment allows wool to retain its softness and bounce while avoiding the dreaded felted laundry mishap.

What is Non-Superwash Wool?

Non-superwash wool is wool in its more natural state, untreated and uncoated. This type of wool behaves more traditionally: it can felt with agitation, and it often needs to be hand washed and dried flat.

Non-superwash wool retains its natural crimp and elasticity, which can be beneficial for certain projects, especially when you want memory and structure in your stitches.

The Pros of Superwash Wool

Machine Washable

This is the biggest win for many crafters. If you're gifting a baby blanket, making a pair of socks for a friend or crafting something that needs to be low-maintenance, machine washability is a significant practical benefit.

Soft and Smooth

Superwash treatment often results in a silkier feel, which is ideal for wearables like shawls, jumpers, hats and socks. It’s especially appreciated by people who are sensitive to the natural texture of wool.

Vibrant Dye Uptake

Superwash yarns often take dye more vibrantly and evenly. So if you're drawn to bold variegated colourways and high-saturation shades, you’ll likely find what you love in superwash options. In saying that, there are plenty of non-superwash yarns that achieve beautiful bold colours too!

Great for Colourwork

Because superwash yarns don’t felt, they’re excellent for colourwork projects where stitch definition is important.

Shrink Resistant

Superwash. yarns are less likely to shrink in the wash (though we still recommend cool water and a gentle cycle).

The Cons of Superwash Wool

Environmental Impact

The treatment process, especially those that use chlorine and resins, can raise environmental concerns. Many processes are improving (some mills now use OEKO-TEX certified practices), but it’s still something to be aware of.

Lacks “Grip”

Superwash yarns are smoother, which means they don’t have the same grip as non-superwash yarn. That can be a challenge for projects like steeking or intricate lacework, where you want the fibres to hold together more securely.

More Stretch, Less Bounce Back

Superwash yarns can stretch more and bounce back less. If your garment relies on the elasticity of the fibre to maintain its shape (think socks or ribbed cuffs), you may need to adjust your tension or use a pattern that accounts for it.

The Pros of Non-Superwash Wool

Eco-Friendly Option

Non-superwash wool is often the more environmentally conscious choice. There’s no chemical processing involved (aside from regular washing), and if it's undyed or naturally dyed, it’s even gentler on the planet.

Great Stitch Memory

Natural crimp in non-superwash wool helps it hold its shape better. Your projects will often look crisp, structured and long-lasting.

Felts Beautifully

If you're intentionally felting a project like a felted bag or slipper, non-superwash is your go-to.

Traditional Feel

Some knitters and crocheters simply prefer the experience of working with non-superwash wool. It feels more 'alive' in the hands with slightly more texture and grip. Some makers say they feel more connected to the sheep it came from.

Warm and Breathable

The scales on untreated wool help trap heat while still allowing breathability, which makes non-superwash wool excellent for winter wear.

The Cons of Non-Superwash Wool

Hand Wash Only

You’ll need to wash your non-superwash projects by hand and lay them flat to dry. While it’s a gentle process, it does require more care, which isn’t always ideal for gifts, time-poor individuals or daily wear items.

Can Feel Scratchier

Depending on the sheep breed and processing method, non-superwash wool can sometimes feel more rustic or coarse. (That’s why we love sourcing options that are beautifully soft and untreated.)

More Prone to Shrinking and Felting

Agitation, heat and water can cause non-superwash wool to felt, even accidentally. So if you’re clumsy with laundry (no judgment here!), you’ll want to keep this in mind.

So… Which One Should You Choose? The Difference Between Superwash Wool and Non-Superwash Wool

That really depends on your project, your values and your lifestyle.

Choose Superwash Wool if…

• You’re making gifts or baby items for someone who will throw items in the laundry

• You want bright colours and smooth finishes

• You or the recipient need machine-washable care

• You’re doing crisp colourwork or want a polished drape

Choose Non-Superwash if…

• You’re creating heirloom-quality garments

• You want strong stitch memory and structure

• You’re looking to reduce chemical processing in your crafting

• You love the feel of wool in its more natural state

Our Approach at Fancy Yarns Australia

At Fancy Yarns Australia, we believe the most sustainable option is the one that best suits you and your lifestyle.

We offer a range of beautiful non-superwash options for those who want to minimise chemical processing and create pieces that really showcase the natural texture of wool.

And for those who prefer superwash yarns for the ease of care and brilliant colour payoff, we stock options that are OEKO-TEX certified, GOTS-certified or dyed in mills that use improved, eco-conscious methods.

Understanding the difference helps you make more confident choices. There's no universally right answer for which type of wool your should choose. It depends on your project, your care preferences and what properties matter most to you. If you're not sure, we're always happy to help!