What pilling is
Pills are the small balls of fiber that collect on the surface of a garment, most visibly on sweaters, cardigans, leggings and blankets. They form when loose fiber ends work their way to the surface through friction, then tangle together into little knots. The knots stay attached because they are anchored by longer fibers still woven into the cloth.
Pilling is a normal property of many fabrics, not necessarily a sign of poor quality or damage. Still, how readily it happens varies a lot with the fiber and the way the yarn is made.
Why some knitwear pills more
Several factors tend to make pilling more likely:
- Short fibers. Yarns spun from short fibers have many loose ends that can work free. Longer fibers are generally spun into yarn with fewer ends on the surface.
- Soft, loosely twisted yarns. They feel pleasant, but the fibers escape more easily.
- Blends of fibers. Synthetic fibers are strong, so a pill that forms on a blend may not break off the way it would on a weaker fiber. This is one reason fiber blends and synthetic fibers can hold onto pills.
- Knit construction. Loose, open knits often pill more than tight ones, which is part of the larger difference between knit versus woven fabrics.
- Friction. The areas that rub, such as underarms, inner arms, sides near a bag strap and where a seatbelt crosses, are usually the first to pill.
Wool garments, especially soft ones like lambswool and merino, are known for early pilling, and it often slows after the loose fibers have worn off. Fine, high-quality yarns may pill less, but there are no guarantees.
Gentle ways to remove pills
The goal is to remove the pills without cutting the yarn that forms the garment. Always work on a flat surface with the knit lightly stretched, and take your time.
A fabric comb or sweater stone
A fine-toothed comb made for knitwear, or a pumice-like sweater stone, gently lifts and removes pills. Hold the fabric taut and stroke lightly in one direction. These tools are inexpensive and give you good control, which makes them well suited to delicate knits. Use a light touch, since heavy pressure can roughen the fabric.
An electric fabric shaver
A battery-powered shaver is faster on large areas, and works well on sturdier knits. Use it on a flat surface and keep the guard in place, moving slowly and not pressing down. It is easier to cut into a loose knit by mistake, so start with an inconspicuous spot, and avoid it on very open or loosely knit pieces.
Scissors for stragglers
For a handful of larger pills, you can lift each one slightly and snip it with small, sharp scissors. This is slow, but safe on fine or open knits where a shaver would be risky.
What to avoid
- Razors and disposable shavers, which can slice the yarn
- Pulling the pills by hand, which can tug the knit and make holes
- Sticky tape or lint rollers for pills, which lift only loose fuzz
If a loop of yarn is pulled out of the fabric, do not cut it. Instead, tug the surrounding fabric gently, or use a needle to draw the loop to the inside. This is one of the simple fixes covered in basic mending.
Reducing future pilling
Prevention is about reducing friction and agitation:
- Wash less often and gently. Use a delicate cycle or hand wash, with cool water as the label allows.
- Turn knits inside out and use a mesh bag. This protects the visible surface from rubbing against other items.
- Avoid washing with rough items. Jeans, towels and anything with hooks or zippers are better kept separate. Our advice on washing clothes by sorting applies particularly here.
- Skip the dryer. Tumbling creates friction and sheds fibers, and the lint trap is a sign. Dry knits flat.
- Rotate wear. Resting a sweater between wears lets the fibers recover, and spreads friction across several pieces.
- Mind bags and straps. If you often carry a shoulder bag, you may notice pills along the strap line. Switching sides occasionally helps.
- Remove pills early. Small pills tend to be easier to remove, and left on, they can catch more fibers.
A note on fuzz
Fuzz, sometimes called fluff, is related but not identical. It consists of loose surface fibers that have not formed into balls. Mohair, angora and brushed fabrics are meant to have a soft halo of fibers, so some shedding is normal. A lint roller or a gentle brush can tidy fuzz without removing anything essential.
When to let go
If a garment is pilling heavily everywhere and the fabric is thin or worn, repeated treatment may not restore it. At that point, it can be worth saving for around the house, or reworking it into something new, as in upcycling clothes. For future purchases, checking garment quality, including how the yarn feels and how tightly it is knitted, can help you pick pieces that stay neat longer. Some pilling is simply part of owning knitwear, and a few minutes with a comb now and then keeps it looking good.