Standard MOQ is typically 150 pcs per style / colour. Selected library trial programmes may start from 100 pcs per colour, subject to fabric availability. Orders below 100 pcs / style / colour carry a combined 15% surcharge for extra fabric scattered-cut costs and additional generation fees. Custom fabric typically ~500 m / colour.

How much is a sample and how long does it take?

Library samples start from US$45 per garment piece (sets charged by piece count). Custom patterns, prints, trims and fabric development are quoted separately. Typical lead 7–9 working days after confirmation. Eligible library sample fees may be credited against a confirmed bulk order, subject to the quoted sample terms. Courier charges are excluded and never credited.

When does the bulk clock start?

Typical bulk lead time is 25–30 days after PPS (pre-production sample) approval. Deposit is taken after PPS sign-off.

What are your payment terms?

30% deposit after PPS sign-off and 70% after passed final AQL. FOB Shenzhen or DDP on request.

Home / Insights / Flatlock vs Overlock for Activewear: Seam Strength Buyers Spec

Fabrics & Compliance · 6 min read · 2026-09-09

Flatlock vs Overlock — What Activewear Buyers Should Spec

Seam choice changes comfort, bulk under compression and failure mode. Spec it — do not leave it to ‘factory standard’.

Quick comparison

	Flatlock	Overlock
Hand under stretch	Lower profile, less chafe risk	More ridge / bulk
Common use	Legging side seams, bra perimeter zones	Joins, interiors, cost-sensitive lines
Spec risk	Needs skilled operators + correct needle	Easier to run; watch bulk under compression

Activewear seam strength test — what to write

Put method, specimen, minimum force and acceptance into the tech pack / quality agreement. Pair with needle damage and stitch density checks. See AQL 2.5.

Tech pack requirements

Seam map by zone (not one global ‘flatlock’).
Stitch type / SPI / needle.
Photo of approved seam on PPS.

Checklist: tech pack requirements.

ZIESHINE path

Library styles already run production-intent seams. For OEM changes, brief via activewear manufacture hub and lock at PPS.

Next steps

Open the manufacture hub for OEM / private-label programmes.
Browse related products in the library.
Review the matching fabric path.
Download buyer checklists (deal sheet / capacity / cert pack).
Submit a development brief — Export desk replies within 12 h.

Related styles

FAQ

Is flatlock always better?

For next-to-skin compression, flatlock often feels better. Overlock can be right for bulk-critical or cost-sensitive seams.

Should every seam be flatlock?

No — mix constructions by zone. Spec by seam map in the tech pack.

How do I test seam strength?

Agree method and minimums (e.g. grab / seam slippage) on the quality agreement before bulk.

Does seam type affect AQL?

Defect classification should call out open seams, skipped stitches and needle damage explicitly.