Superwash Yarn: Soft, Strong, and Machine Washable—Is It Right for You?


Superwash yarn has become a popular choice among knitters and crocheters, offering the natural warmth of wool with the convenience of easy care. Understanding its production process, advantages, and potential drawbacks can help you make informed decisions for your projects.

What is Superwash Yarn?

Superwash yarn is wool that has undergone a special treatment to make it machine washable and less prone to felting. This process modifies the wool fibres, allowing them to withstand the agitation and temperature changes of machine washing without shrinking or matting.

How is Superwash Yarn Made?

The superwash process typically involves two main steps:

  1. Removing or Smoothing the Scales: Wool fibres have microscopic scales that can interlock during washing, leading to felting. In the superwash process, these scales are either removed or smoothed out. This is often achieved through a chlorine treatment, which dissolves the scales. Alternatively, some methods use enzymes to modify the scales in a more environmentally friendly way. Manteco

  2. Applying a Polymer Coating: After treating the fibres, a polymer coating is applied to further smooth the surface and prevent felting. This coating helps the fibres slide past each other during washing, maintaining the yarn's integrity. Modern Daily Knitting 

Advantages of Superwash Yarn

  • Machine Washable: The primary benefit is its ability to be machine washed without felting, making it ideal for items that require frequent cleaning, such as baby garments and socks.

  • Softness and Comfort: The treatment process often results in a softer yarn, enhancing comfort for next-to-skin wear.

  • Vibrant Colors: Superwash yarns tend to absorb dyes more readily, resulting in bright and vivid colors. Pearland Clover Yarn Co. 

Drawbacks of Superwash Yarn

  • Environmental Concerns: The traditional superwash process involves chemicals like chlorine, which can have environmental impacts if not properly managed. However, some manufacturers are adopting more sustainable methods to address these concerns. Manteco

  • Reduced Elasticity: The treatment can reduce the natural elasticity and memory of wool, leading to garments that may stretch out over time. Knitfarious

  • Different Blocking Behavior: Superwash yarns may not hold blocking as well as untreated wool, which can affect the final appearance of lace or textured patterns.

Is Superwash Yarn Right for Your Project?

When choosing yarn for your project, consider the following:

  • Care Requirements: If you prefer low-maintenance items or are gifting to someone who may not hand wash, superwash yarn is a practical choice.

  • Project Type: For items like socks, baby clothes, or everyday wear that need frequent washing, superwash yarn offers convenience.

  • Environmental Impact: If sustainability is a priority, look for superwash yarns processed with eco-friendly methods or consider untreated wool.

At Skein and the Stitch, we offer a variety of yarns to suit your needs, including both superwash and non-superwash options. Explore our collection to find the perfect yarn for your next project.