Pilling is the small bobbles that form where a knit rubs against itself or against something else — under the arms, along the sides, where a bag strap sits. Almost every sweater does it to some degree. What varies is how quickly, and whether it keeps happening.
Here is what causes it, what it does and does not say about quality, and what actually prevents it.
Why is my sweater pilling so much?
Pills form when short fibre ends work loose from the yarn, tangle together and stay attached. Three things drive it:
- Fibre length. Yarn spun from short fibres has more loose ends to escape. Long-staple fibres hold together and pill far less.
- Twist. A loosely twisted yarn releases fibres more readily than a tightly twisted one, which is why two sweaters of the same material can behave completely differently.
- Friction. This is the one you control. Most pilling happens in the wash and at the points where fabric rubs during wear.
Note what is not on that list: price. An expensive sweater made from short-staple yarn will pill faster than a modest one made from long-staple.
Does pilling mean poor quality?
Not on its own, no — and this is the most common misreading. Some genuinely fine natural fibres pill readily because they are soft, and softness and pilling come from the same property: fine, short, flexible fibres.
What does indicate a quality problem is pilling that continues indefinitely. A good knit sheds its loose surface fibres in the first few wears, pills a little, and then settles. Once you have removed that first crop, it should largely stop. A knit that produces a fresh layer every single wear, month after month, is poorly spun.
So the honest test is not does it pill but does it stop. Some knits are also constructed to resist it from the start — our Crewneck Knit uses a denser jacquard construction with an anti-pilling finish for that reason. You can see the range in men’s knitwear and women’s knitwear.
How to prevent sweaters from pilling
Nearly all of it comes down to reducing friction. In order of how much difference it makes:
- Turn it inside out before washing. The single most effective habit. The abrasion then happens on the inside face, where you will not see it.
- Wash cold, on a gentle or wool cycle. Heat and agitation both loosen fibres. Cold water and a slow spin roughly halve the problem.
- Wash it less. Knitwear worn over a shirt or tee rarely needs washing after one wear. Air it overnight instead.
- Do not tumble dry. A tumble dryer is a friction machine. Lay flat to dry, reshaped by hand.
- Wash with like fabrics. Denim and towels are abrasive. A knit tumbling against a zip will pill in one cycle.
- Fold, never hang. Hanging stretches the shoulder and encourages rubbing at the seam.
One more, less obvious: alternate your knitwear. A sweater worn two days running gets no chance for the fibres to recover, and pills faster than the same sweater worn twice a week.
Can you reverse pilling on sweaters?
You cannot un-form a pill, but you can remove it cleanly, and a de-pilled knit genuinely looks close to new. The method matters more than the tool.
Lay the sweater flat on a hard surface — never de-pill while wearing it, and never while it hangs, because you will stretch or cut the knit. Work in one direction with light pressure, in small sections. A fabric comb or a battery sweater shaver both work; the shaver is faster on large areas, the comb is safer around ribbing and seams.
Do not use scissors, and do not pull pills off by hand. Both drag the fibre out of the fabric rather than cutting it at the surface, which creates the next pill and, over time, a thin patch.
Expect to do this once or twice in a knit’s first season, then rarely.
What to look for when buying
You can predict most of this in the shop. Rub the fabric briskly between your palms for a few seconds. If fibres lift immediately, it will pill early. Look at the surface against the light: a clean, defined stitch means a tighter twist and a longer life than a hazy, fuzzy one.
Then check the construction. A denser knit or a textured stitch distributes friction across more surface, so it holds up better at the elbows and sides than a flat, loosely knitted face.
Pieces built with that in mind sit in Autumn ’26 for men and Autumn ’26 for women, including the Quarter-Zip Knit and the Alpine Crewneck.