Premium knitwear is judged after the fifth wash, not on the hanger. Pills on the cuffs and a hoodie that shrinks a size are the two complaints that turn a premium price into a refund. This guide covers why cut-and-sew knits pill and shrink, how both are tested, and the gates we use to keep them in check.
This guide covers cut-and-sew knits — French terry, fleece, jersey, rib. Fully-fashioned sweaters follow different rules.
Polyester fibres anchor pills to the surface; cotton-rich pills tend to break away. Blend choice changes the look of wear.
Compacting, relaxation and yarn-lot control happen before cutting — not after a complaint.
CloudTouch™ 260 runs a pilling grade 4–5 programme gate, with the yarn lot locked before cut.
What “premium knitwear” covers here
Our knit floor makes cut-and-sew knitwear: hoodies, sweatshirts, joggers and tops cut from knitted fabric such as French terry, fleece, jersey and rib. Fully-fashioned sweaters knitted to shape on flat machines are a different product with different tests; we do not make them. Everything below applies to cut-and-sew knits.
Why knits pill — and why some pills stay
Pills form when fibre ends work loose under friction, tangle and roll into balls. Three things decide how bad it looks:
- Fibre length and twist. Short-staple cotton and low-twist yarns release more fibre ends. Combed and compact-spun yarns release fewer.
- Fibre strength. Cotton pills tend to break off; polyester fibres are strong enough to anchor pills to the surface, so cotton/polyester blends can look worse with wear even when they test similarly at first.
- Surface. Brushed fleece and raised backs have loose fibres by design; French terry’s flat face resists better. Friction zones — cuffs, underarms, the seat of joggers — fail first.
| Method | How it abrades | Best for |
|---|---|---|
| ISO 12945-1 (pilling box) | Specimens on tubes tumbled in a cork-lined box | Knitwear and lofty knits |
| ISO 12945-2 / ASTM D4970 (modified Martindale) | Rubbed in a Lissajous pattern against fabric | Most knit and woven apparel |
| ASTM D3512 (random tumble) | Tumbled freely with cork liner | US retailer manuals |
Why knits shrink — and twist
Relaxation shrinkage. Knitting and finishing stretch the fabric lengthwise. The first wash lets the loops relax back, shortening length — cotton-rich knits most of all.
Progressive shrinkage. Tumble drying keeps compacting cotton over several washes. A one-wash test can miss it.
Spirality. Single jersey can twist after washing, pulling side seams to the front. It is measured as skewness and controlled by yarn twist balance and finishing.
Shrinkage is designed out before cutting — by compacting or relaxation finishing at the mill, by locking one yarn lot for the order, and by building the expected residual into the pattern.
| Method | What it measures |
|---|---|
| ISO 6330 + ISO 5077 (with ISO 3759 marking) | Dimensional change of fabric or garment after a defined domestic wash and dry |
| AATCC TM135 / AATCC TM150 | Dimensional change of fabrics / garments after home laundering (US methods) |
| ISO 16322-3 / AATCC TM179 | Spirality / skewness after laundering |
Many brand manuals allow somewhere around 3–5% on cotton-rich knits; your manual decides. Always state the wash programme, the drying method (line or tumble) and the number of cycles alongside the limit.
Our knit gates
- Yarn lot booked first. One lot per order, booked before cutting, so hand, shade and shrinkage behaviour do not drift mid-run.
- Fabric screening. CloudTouch™ 260 (62% cotton / 33% polyester / 5% spandex French terry) runs a pilling grade 4–5 programme gate.
- Garment wash test on PPS. The pre-production sample is washed to the care label and measured at chest, body length, sleeve and hem, so shrinkage is judged on the garment, not just the roll.
- Decoration check. Prints, embroidery and labels are washed with the garment — a stable body with a puckering print still fails.
Knit bulk typically runs about 25–32 days after PPS. Terry versus fleece choices are compared in French terry vs brushed fleece, and a real colour-transfer and pilling fix is reconstructed in the pilling and colour transfer case.
- Pilling ISO 12945-2 at [n] rubs: grade ≥ [x] on face; cuffs and seat checked on garment
- Dimensional change ISO 6330 [programme] + ISO 5077 after [n] cycles, [line/tumble] dry: within ±[x]%
- Spirality ISO 16322-3: within [x]% on single jersey styles
- Yarn lot locked per order; PPS washed and measured before bulk cut
Methods and sources cited
- ISO 12945-1, ISO 12945-2, ASTM D4970, ASTM D3512 — pilling
- ISO 6330, ISO 5077, ISO 3759 — washing and dimensional change
- AATCC TM135, AATCC TM150 — dimensional change after home laundering
- ISO 16322-3, AATCC TM179 — spirality / skewness
Standards are named as the methods buyers commonly specify. Factory results are only those stated as on file; programme results are reported per brief.