Case Study: Custom Jacket Zipper Slider for a Shopify DTC Brand in Japan
Source:Jacket Zipper Slider /
Time:2026-09-18
Jacket Zipper Slider for a Shopify DTC Brand in Japan
A Shopify DTC Brand approached us with a jacket zipper slider requirement for Japan. The brief was specific: a defined look, a hard launch date and a unit cost that had to survive shipping and duty. This case study records what was specified, what went wrong in sampling and how the bulk order was delivered.
The challenge
- Suppliers who disappear once the deposit is paid
- Minimum order quantities far above what a growing brand can absorb
- Packaging that arrives crushed and unsellable
What we specified
| Product | Jacket Zipper Slider |
|---|---|
| Client type | A Shopify DTC Brand |
| Market | Japan |
| Order volume | 8,000 pieces across 6 colourways |
| Base fabric | Ring-Spun Cotton |
| Decoration | Yarn Dyeing |
| Size range | Custom grading |
| Sampling rounds | 2 |
| Delivery window | 6 weeks from PO to ex-factory |
How it was resolved
- We rebuilt the tech pack around Ring-Spun Cotton and locked shrinkage allowance before grading.
- Decoration was moved to Yarn Dyeing after strike-off tests showed better wash durability.
- A pre-production sample was approved and retained as the golden reference.
- Production ran with in-line inspection and a mid-run photo report.
- Cartons were packed to the client's own barcode and size ratio specification.
Result
- 8,000 pieces delivered inside the 6-week window.
- Unit cost held within 1.5% of the original quotation.
- Return rate linked to fit or workmanship stayed under 1.0%.
- The specification is now on file, so reorders reproduce the approved sample.
What we would repeat
Approve a pre-production sample from the actual bulk fabric. Proto cloth behaves differently in cutting and washing.
Planning something similar?
Tell us the quantity, target price and delivery window, and we will build a customisation programme around those three numbers.
