Is Acrylic Yarn Just Plastic? What It Is and When to Use It
Sullivans International
•4 min read
Acrylic yarn is yarn made from a synthetic polymer called polyacrylonitrile (PAN)—so yes, it is a type of plastic. The polymer is spun into fibers and then into yarns. Acrylic is affordable, durable, colorfast, and versatile in texture and color; it is not biodegradable and is less breathable than most natural fibers.
In this guide, we clarify what acrylic yarn is, how it compares to natural fibers, and when to choose or avoid it.
Acrylic yarn is yarn made from acrylic fiber, which is produced from polyacrylonitrile—a synthetic polymer, i.e. a plastic. The polymer is spun into fibers and then into yarns used for knitting and crochet. Acrylic can be made to look and feel like wool, cotton, or silk and is often dyed in a wide range of colors; it can also be engineered for properties such as moisture-wicking or flame resistance.
Yes. Acrylic yarn is made from polyacrylonitrile, which is a type of plastic. That does not mean it is "bad"—it means it is synthetic and has different care, environmental, and performance traits than wool or cotton. Choosing it depends on budget, project, and priorities (e.g. ease of care vs. natural fibers and sustainability).
| Aspect | Acrylic (plastic) | Wool / Cotton (natural) |
|---|---|---|
| Material | Synthetic polymer (plastic) | Animal or plant fiber |
| Cost | Generally lower | Generally higher |
| Shrink / fade | Resists shrink and fade | Can shrink; may fade |
| Breathability | Lower | Higher |
| Biodegradability | No | Yes (in normal conditions) |
| Pests / rot | Resistant | Can be affected |
| Texture / color | Can mimic wool, cotton, silk | Natural hand and dyes |
Acrylic yarn is a plastic-based yarn (polyacrylonitrile). It is affordable, durable, and versatile but not biodegradable and less breathable than wool or cotton. Whether to use it is a personal choice based on project, budget, and environmental priorities.
Yes. Acrylic yarn is made from polyacrylonitrile, a synthetic polymer (a type of plastic), spun into fibers and then into yarn.
Acrylic is not biodegradable and can persist in landfill. It has a different environmental footprint than natural fibers; choice depends on your sustainability priorities.
Some people experience skin irritation or allergies with acrylic. If you have sensitive skin, test a small area or choose natural fibers.
This article is part of our yarn knowledge series, offering practical insights into fiber types and selection for knitters and crocheters.