After your first few combing sessions, you'll notice a fluffy, tangled mass of short fiber accumulating in the comb tines — fiber that didn't make it through the transfer strokes. If you're new to combing, it's easy to look at that pile and feel like something went wrong. It didn't. That's noil, and it's supposed to be there.
When wool is prepared using wool combs, the longer fibers become aligned while shorter fibers are separated and left behind. These short fibers are called noil. Understanding noil helps spinners learn how combing works and how fiber preparation affects the structure of yarn. While noil is removed during combing, it is still useful for many fiber projects.
What Noil Is and Why Combing Produces It
Noil refers to the short fibers that remain on the comb after the longer fibers have been transferred during the comb transfer process. During each transfer stroke, the tines of the moving comb catch the longer fibers and carry them across, while the shorter fibers — which are too short to bridge the gap between tines — remain caught in the stationary comb. This is not a flaw in the process; it is the mechanism by which combing works. The tine spacing acts as a physical filter, sorting fiber by length with each pass.
| Fiber Type | Result During Combing | End Use |
|---|---|---|
| Long fibers | Continue through comb transfers; become aligned | Combed top for worsted spinning |
| Short fibers (noil) | Remain on the comb; accumulate with each pass | Carded spinning, felting, blending |
As transfers continue, noil accumulates in the stationary comb and eventually forms a loose, fluffy mass. It typically has a soft, somewhat tangled appearance and may contain small fragments of vegetable matter that were too small to remove during skirting and washing. The amount of noil produced increases with each additional transfer pass — more passes produce a more refined combed preparation but also a higher noil percentage, which is a trade-off to consider when deciding how many passes to perform.
Why Removing Short Fibers Matters for Spinning
The reason combing removes short fibers is directly connected to how worsted yarn is spun. Worsted spinning relies on long, parallel fibers that slide past each other smoothly and predictably during drafting. Short fibers disrupt this process because they are not long enough to be held securely in the fiber bundle — they slip out unpredictably during drafting, creating thin spots and lumps in the yarn. The more short fibers present in a worsted preparation, the more inconsistent the drafting behavior and the less smooth the resulting yarn.
By removing short fibers through combing, the spinner is left with a preparation where all the fibers are long enough to draft consistently. The combed top that results from a well-executed combing session — with noil properly removed — drafts smoothly and evenly, produces yarn with a characteristic worsted sheen, and has better tensile strength than a preparation that includes short fibers. This is why combing is the preferred preparation method for fine worsted spinning, and why the noil it produces is a sign that the process is working correctly rather than a sign of waste.
How Much Noil Is Normal?
The amount of noil produced during combing varies considerably depending on the fleece and the combing technique. A fleece with long staple length and good fiber quality will produce relatively little noil — perhaps 10 to 15 percent of the original fiber weight — because most of the fiber is long enough to pass through the comb tines freely. A fleece with shorter staple, more second cuts, or significant vegetable matter contamination may produce substantially more noil, sometimes 25 to 35 percent or more of the original weight.
The number of comb transfers also affects noil production: more transfers produce more aligned fiber but also remove more short fibers, increasing the noil percentage. A spinner who does many transfer passes to achieve a very clean, well-aligned preparation will produce more noil than one who does fewer passes and accepts a slightly less refined result. Excessive noil beyond what the breed and staple length would predict is worth investigating — it may indicate second cuts from the shearing, tender fiber that is breaking during combing rather than transferring cleanly, or heavy vegetable matter contamination. Learn more about why staple length matters when combing.
Common Uses for Noil
Noil is not waste fiber. Many fiber artists use noil for different projects, and the short, randomly oriented fiber structure that makes noil unsuitable for worsted spinning is actually an advantage for several other applications. For wet felting and needle felting, short fibers felt more readily than long fibers because they have more surface area relative to their length and interlock more easily. Noil is excellent for felting projects and produces a dense, consistent felt with good structural integrity.
| Use | Why Noil Works Well |
|---|---|
| Carded woolen spinning | Short fibers card easily into a lofty woolen preparation |
| Wet felting | Short fibers interlock readily; produce dense, consistent felt |
| Needle felting | Short fibers tangle easily around the barbed needle |
| Fiber blending | Noil adds texture and softness when blended with other fibers |
For woolen spinning, noil can be carded into a light, airy preparation that spins into a soft, lofty yarn with a characteristically woolen texture — quite different from worsted yarn spun from the same fleece, with more air and texture but less strength and sheen. Many spinners deliberately save their noil and accumulate it over multiple combing sessions for use in these secondary projects. Learn more about creating custom fiber blends with a wool hackle.
Saving and Storing Noil
Many spinners collect noil and store it for future projects. Because noil is already washed and processed, it does not have the natural lanolin protection of raw fleece, which makes it slightly more vulnerable to moth damage than unwashed fiber. A breathable fabric bag or a cardboard box with a cedar block or lavender sachet inside provides good protection for stored noil. Sealed plastic bags should be avoided for the same reason they are avoided for raw fleece — they trap moisture and prevent the airflow that wool needs to stay in good condition.
Many spinners keep a dedicated noil bag or bin near their combing setup and add to it continuously during combing sessions, then process the accumulated noil into a carded preparation when enough has been collected for a project. Labeling the storage container with the fiber type and breed is helpful if noil from multiple fleeces is being collected separately — noil from a fine Merino fleece will behave very differently from noil from a longwool breed, and keeping them separate preserves the option to use each for the most appropriate project.
Noil and Yarn Structure: What the Difference Looks Like
The presence or absence of short fibers changes the character of yarn in ways that are visible and tactile. Combed fiber — with noil removed — produces smooth worsted yarn with a characteristic sheen, good tensile strength, and a firm, dense hand. The parallel fiber alignment means the yarn reflects light evenly and has a polished appearance. Carded fiber — which retains short fibers in a random orientation — produces airy woolen yarn with a soft, lofty hand, more warmth, and a slightly fuzzy surface. Noil spun directly (after carding) produces a soft, textured yarn that falls somewhere between these two extremes, with the loft of woolen preparation and the slightly irregular texture that comes from the short fiber length.
Understanding this spectrum helps spinners make intentional choices about fiber preparation rather than treating noil as a problem to be discarded. The same fleece can produce very different yarns depending on whether it is combed (with noil removed), carded (with short fibers retained), or processed as noil separately. Each preparation has its appropriate uses, and a spinner who understands the role of noil in fiber preparation has more creative options available than one who simply treats it as waste. Mixing noil back into combed fiber defeats the purpose of combing — if a blended short-and-long preparation is the goal, carding is the more appropriate tool from the start.
Key Takeaways
- Noil is the short fiber left behind on the comb tines after longer fibers have been transferred — it is a natural byproduct of the combing process, not a mistake
- Combing separates fiber by length — the tine spacing allows long fibers to pass through freely while short fibers remain caught, which is what makes combing effective for worsted preparation
- Short fibers disrupt worsted drafting by slipping out of the fiber bundle unpredictably — removing them through combing produces smoother, more consistent yarn
- Noil is not waste — it is well suited for carded woolen spinning, wet felting, needle felting, and fiber blending where short, randomly oriented fiber is an advantage
- A long-staple, high-quality fleece produces 10–15% noil; a shorter-staple or more contaminated fleece may produce 25–35% or more — more comb transfers also increase noil percentage
- Excessive noil beyond what the breed and staple length would predict is a signal worth investigating — it may indicate second cuts, tender fiber breaking during combing, or heavy vegetable matter
- Noil should be stored in breathable containers with moth protection — it lacks the natural lanolin of raw fleece and is slightly more vulnerable to moth damage than unwashed fiber
- Mixing noil back into combed fiber defeats the purpose of combing — if a blended short-and-long preparation is the goal, carding is the more appropriate tool
- Carded noil spun with a long draw produces soft, lofty woolen yarn — quite different from worsted yarn spun from the same fleece, with more air and texture but less strength and sheen
Frequently Asked Questions
What is noil in wool combing?
Noil is the collective term for the short fibers that are left behind on the comb tines after the longer fibers have been transferred during the combing process. When wool is combed, the repeated transfer strokes between the two combs cause the longer fibers to migrate through the tines and accumulate on the moving comb, while the shorter fibers — which cannot travel as freely through the tine spacing — remain caught in the stationary comb. The result is a natural separation by fiber length: the longer, more aligned fibers become the combed preparation used for worsted spinning, and the shorter, less aligned fibers that remain are the noil. Noil typically has a fluffy, somewhat tangled appearance and may contain small fragments of vegetable matter that were too small to remove during skirting and washing.
Is noil waste fiber?
No — noil is a byproduct of combing, not waste. The distinction matters because noil still has significant value for a range of fiber projects, just not for the same purpose as the combed preparation. For worsted spinning, noil is undesirable because the short, randomly oriented fibers disrupt the smooth, parallel alignment that worsted yarn requires. But for woolen spinning, felting, and fiber blending, noil is actually well-suited. Short fibers felt more readily than long fibers because they have more surface area relative to their length, which makes noil excellent for wet felting and needle felting projects. For woolen spinning, noil can be carded into a light, airy preparation that spins into a soft, lofty yarn with a characteristically woolen texture. Many spinners deliberately save their noil and accumulate it over multiple combing sessions for use in these secondary projects.
Why do combs remove short fibers?
Wool combs remove short fibers as a natural consequence of how the combing mechanism works, and this removal is one of the primary reasons combing is used for worsted preparation. The tine spacing on wool combs is calibrated to allow fibers above a certain length to pass through freely during the transfer stroke, while fibers below that length are too short to bridge the gap between tines and remain caught in place. This physical sorting by length produces a combed preparation that is more uniform in fiber length than the original fleece, which translates directly into more consistent drafting behavior during spinning. Short fibers in a worsted preparation cause drafting irregularities because they slip out of the fiber bundle unpredictably, creating thin spots and lumps in the yarn. Removing them through combing produces a preparation that drafts smoothly and evenly.
Can noil be spun?
Yes, noil can be spun, but it requires a different preparation method than the combed fiber it came from. Because noil consists of short, randomly oriented fibers, it is not suitable for worsted spinning, which requires long, parallel fibers. However, noil responds well to carding, which further opens and randomizes the fiber orientation to create a woolen preparation. Carded noil can then be spun using a woolen technique — typically with a long draw — into a soft, lofty yarn with a textured, slightly fuzzy character. The resulting yarn is quite different from worsted yarn spun from the same fleece: it has more air, more loft, and a softer hand, but less strength and smoothness. Noil yarn is well suited for projects where softness and texture are more important than durability and sheen.
How much noil is normal during wool combing?
The amount of noil produced during a combing session varies considerably depending on the fleece and the combing technique. A fleece with long staple length and good fiber quality will produce relatively little noil — perhaps 10 to 15 percent of the original fiber weight — because most of the fiber is long enough to pass through the comb tines freely. A fleece with shorter staple, more second cuts, or significant vegetable matter contamination may produce substantially more noil, sometimes 25 to 35 percent or more of the original weight. The number of comb transfers also affects noil production: more transfers produce more aligned fiber but also remove more short fibers, increasing the noil percentage. A spinner who does many transfer passes to achieve a very clean, well-aligned preparation will produce more noil than one who does fewer passes and accepts a slightly less refined result.
How should noil be stored?
Noil should be stored in the same conditions as any other clean wool fiber — in a dry location, away from direct sunlight, in a breathable container, and protected from moths. Because noil is already washed and processed, it does not have the natural lanolin protection of raw fleece, which makes it slightly more vulnerable to moth damage than unwashed fiber. A breathable fabric bag or a cardboard box with a cedar block or lavender sachet inside provides good protection for stored noil. Many spinners keep a dedicated noil bag or bin near their combing setup and add to it continuously during combing sessions, then process the accumulated noil into a carded preparation when enough has been collected for a project. Labeling the storage container with the fiber type and breed is helpful if noil from multiple fleeces is being collected separately.
Does more noil mean lower quality fleece?
Not necessarily, though there is some correlation. A fleece with very short staple length will naturally produce more noil than a long-staple fleece, simply because more of the fiber falls below the threshold length that the comb tines can carry through. This does not mean the fleece is low quality — it may be a perfectly healthy, well-grown fleece from a breed that naturally produces shorter fiber. However, a fleece with excessive noil due to second cuts, tender fiber that breaks during combing, or heavy vegetable matter contamination is a sign of lower quality, because these are defects rather than natural breed characteristics. The most useful way to interpret noil quantity is in context: if a fleece produces more noil than expected for its breed and staple length, it is worth investigating whether the excess is coming from second cuts, tenderness, or contamination.
Can I mix noil back into combed fiber?
Technically yes, but doing so defeats the purpose of combing. The entire point of the combing process is to separate short fibers from long fibers to create a uniform, well-aligned preparation for worsted spinning. Mixing noil back into the combed fiber reintroduces the short, randomly oriented fibers that combing was designed to remove, which will disrupt the smooth drafting behavior of the combed preparation and produce a less consistent yarn. If the goal is a blended preparation that includes both long and short fibers, it is more efficient to skip the combing step and use carding instead, which intentionally mixes fibers of different lengths into a woolen preparation. The one situation where mixing noil back in might make sense is if a spinner wants to intentionally create a semi-worsted or textured yarn with some of the loft and softness of woolen preparation combined with some of the alignment of worsted — but this is a deliberate stylistic choice rather than standard practice.
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