Buyers often specify a fabric by weight and construction, then leave the yarn to the mill. That is fine for stock qualities, but as soon as you go custom — or as soon as your customer complains about pilling — yarn choice becomes the single biggest decision. Here is what you actually need to specify and why.
1. Combed or Carded?
Every cotton yarn starts as raw fiber that is cleaned, aligned, and spun. Whether or not it goes through the combing step is the biggest quality dividing line.
- Carded cotton — the standard, cheaper option. Short fibers remain in the yarn. Softer than synthetic yarn but pills faster and has a slightly hairy surface.
- Combed cotton — an extra step removes fibers shorter than about 12–15 mm. The remaining yarn is stronger, smoother, and pills less. Roughly 15–25% more expensive.
Rule of thumb: for skin-contact articles (T-shirts, baby wear, premium bedding) always specify combed. For interior lining, workwear, or low-price mass-market items, carded is fine.
2. Ring-Spun or Open-End?
Two dominant spinning technologies produce very different yarns:
- Ring-spun — traditional, slow, produces stronger and softer yarn. Standard for quality apparel fabrics.
- Open-end (rotor) — faster, cheaper, produces a bulkier, slightly weaker yarn. Common for denim, terry towels, and mass-market knits.
A 30s ring-spun combed cotton yarn will feel noticeably better than a 30s open-end carded yarn — even at the same "30s combed cotton" spec on the tech pack. Never leave the spinning method out of the specification.
3. Yarn Count — What the Numbers Mean
Yarn count expresses how fine the yarn is. In the cotton world, the dominant system is the English count (Ne): the higher the number, the finer the yarn.
- 10s–16s — heavy yarns; denim, canvas, heavy knits, workwear.
- 20s–30s — mid-weight; standard T-shirts, sweatshirts, oxfords, mid-weight bedding.
- 32s–40s — the "sweet spot" for premium T-shirts, poplin shirtings, quality bedding.
- 50s–60s — fine yarns; fine shirtings, luxury bedding, lightweight blouses.
- 80s–100s — very fine, extra-long-staple cotton (Egyptian / Xinjiang) territory; luxury shirtings and premium sheeting.
Metric count (Nm), common for linen and wool, works the same way (higher = finer). Some quotations mix Ne, Nm and tex — always confirm which system is being used.
4. Ply and Twist
Two or more single yarns twisted together make a plied yarn — noted as 2/40s, 2/60s, etc. Plied yarns are more balanced, stronger, and give the finished fabric better dimensional stability. A shirt in 2/60s combed cotton drapes better and lasts longer than a shirt in 40s single yarn at similar weight — but costs about 20% more in raw yarn.
Twist per meter (TPM) is another lever: higher twist yields a crisper, more washable fabric; lower twist yields softer, sometimes puffier fabric. If you know exactly the hand feel you want, ask the mill to quote a specific TPM.
5. Cotton Origin — Where the Fiber Comes From Matters
- Xinjiang (China) — long staple, uniform, strong. The gold standard for premium Chinese cotton products, but complex from a market-access perspective in some regions.
- Egyptian (Giza) — the most famous extra-long staple, associated with luxury bedding.
- US Pima / Supima — long staple, verified via the Supima trademark program.
- Indian, Pakistani, Brazilian — mainstream commodity cotton for open-end and mid-count ring-spun yarns.
If your product story depends on cotton origin, ask for a chain-of-custody document — not just a claim on the sales contract.
6. Certifications for Cotton Yarn
- BCI (Better Cotton Initiative) — mass-balance system, most affordable sustainability claim.
- OEKO-TEX Standard 100 — chemical safety on the finished yarn.
- GOTS — for organic yarn, minimum 70% organic content (95% for the strict "organic" label).
- GRS — for recycled cotton yarn.
7. Common Yarn-Level Defects to Watch For
- Neps & slubs — small knots or thick spots in the yarn. Some are acceptable; excessive amounts create visible surface defects.
- Foreign fiber — colored fibers contaminating white yarn. A recurring headache for white bedding.
- Weak yarn count deviation — actual count differs from stated count. Always ask for count test reports.
- Uneven twist — causes stripes in finished woven fabric.
Sourcing Cotton Yarn?
BEANTEX supplies combed and carded cotton yarns from vetted Chinese spinning mills, with lot testing and third-party inspection built into every order. Send us your spec — count, ply, TPM, and certifications — via our inquiry page and we'll come back with quotes from two or three shortlisted mills.