# Cashmere Pilling: What Causes It and What Actually Fixes It

Source: https://kiltermuse.com/blog/2026-11-08-cashmere-pilling-causes-fixes/

KilterMuse answers


**Short answer:** Cashmere pills because the fibres are short, 36 to 45 millimetres, and fine, 12 to 19 microns, so they work loose and tangle where the fabric rubs. A comb is the gentlest fix, a shaver is faster for heavy pilling, and the prevention is lukewarm water at or under 30 degrees, a pH-neutral wool detergent, and 24 to 48 hours of rest between wears.

## Short fibres, and where they go

Cashmere pills because of what it is. The fibres are short, 36 to 45 millimetres, and fine, 12 to 19 microns across, and short fine fibres work loose from the yarn more easily than long coarse ones. The loose ends tangle where the fabric rubs against itself or against something else, the underarm, the waistband, the seat of a chair, and the tangle becomes a pill. Grade A cashmere uses longer fibres, 34 to 42 millimetres, and it pills less, but it still pills, because the fibre is what it is.

The International Wool Textile Organisation's rule is the short version: longer fibres resist migration and breakage, and shorter fibres do not. A sweater made from short fibre cashmere will pill in the first weeks, and the pilling will slow down as the loose fibres work themselves out. The pills are not a defect. They are the fibre behaving the way short fibres behave.

## The comb, the shaver, and the order to use them

A cashmere comb is the gentlest fix. It lifts the pills off without cutting the fibres underneath, and it is the tool for light pilling and for regular maintenance. A fabric shaver is faster, and it is the tool for heavy pilling, but it cuts, and a shaver used too often or too hard will thin the fabric. The order is the rule: comb first, shaver only when the comb cannot keep up.

Lay the sweater flat, pull the fabric taut, and work in one direction. The pills come off, the surface smooths, and the sweater looks new. Do it every two to three wears, and the pilling never gets ahead of you. Wait until the sweater is covered, and the job takes an hour and the fabric pays for it.

## Wash it cold, and wash it less

The wash is where most pilling starts. Hot water and agitation loosen the fibres, and a harsh detergent strips the natural oils that keep them smooth. Wash lukewarm, at or under 30 degrees, with a pH-neutral wool detergent, and turn the sweater inside out before it goes in. The inside out is the part people skip, and it is the part that protects the outside, which is the part anyone sees.

Wash less often. Cashmere does not need washing after every wear, and every wash is a chance for the fibres to loosen. Air the sweater between wears, spot clean the marks, and wash it when it needs it, not when the calendar says so. The sweater will last longer, and it will pill less, because the fibres are not being worked loose every week.

## Rest is not optional

Rest the sweater for 24 to 48 hours between wears. The fibres recover their shape when they are left alone, and a sweater worn three days running pills faster than the same sweater worn once and rested. The rest is not superstition. It is the fibre relaxing back into place, and it is the cheapest prevention there is.

Rotate. A single cashmere sweater worn every day will pill in weeks. Three sweaters rotated through the week will each last years. The rotation is the wardrobe version of the rest rule, and it is the reason a small collection of good sweaters outlasts a large collection of cheap ones.

Keep reading: [Wool That Does Not Itch: The 18.5 Micron Rule](https://kiltermuse.com/blog/2026-11-06-wool-that-doesnt-itch/), [The Winter Capsule: Ten Pieces That Actually Work Together](https://kiltermuse.com/blog/2026-11-06-winter-capsule-ten-pieces/), [Linen in Winter: The Layering Trick That Actually Works](https://kiltermuse.com/blog/2026-11-07-linen-winter-layering/).

## Frequently asked questions

### Why does cashmere pill so much?

Because the fibres are short, 36 to 45 millimetres, and fine, 12 to 19 microns. Short fine fibres work loose from the yarn and tangle where the fabric rubs, and the tangle becomes a pill. Longer fibre Grade A cashmere pills less, but all cashmere pills, because the fibre is what it is.

### Should I use a comb or a shaver on cashmere?

Comb first. A cashmere comb lifts pills off without cutting the fibres underneath, and it is the tool for light pilling and regular maintenance. A fabric shaver is faster for heavy pilling, but it cuts, and used too often it will thin the fabric. Comb every two to three wears and the shaver rarely needs to come out.

### What temperature should I wash cashmere at?

Lukewarm, at or under 30 degrees, with a pH-neutral wool detergent, and turn the sweater inside out first. Hot water and agitation loosen the fibres and start the pilling. Wash less often too, cashmere does not need washing after every wear, and every wash is a chance for the fibres to loosen.

### How long should I rest cashmere between wears?

Twenty-four to 48 hours. The fibres recover their shape when left alone, and a sweater worn three days running pills faster than the same sweater worn once and rested. Rotate through a few sweaters and each one lasts years instead of weeks.