The approved fabric is unavailable, and the supplier offers a replacement described as “almost the same.” Before accepting it, ask exactly what would change in the product and which earlier approvals still apply.
A swimwear material substitution needs its own decision record. A similar photograph, matching color name or unchanged fiber description is not a complete basis for approving a replacement.
Identify both materials before comparing them
Record the approved material reference and the proposed alternative separately. Ask which supplier, article reference, color, finish and stated specifications apply to each. Request a physical swatch of the actual alternative being proposed.
Explain why the change is needed and which order lines it affects. A substitution for one colorway should not quietly become permission to replace material across the entire collection.
Keep this record with the current swimwear tech pack, including the shell, lining and relevant components. Avoid overwriting the original reference before the replacement decision is complete.
Make a review plan around the affected decisions
| Area | Question to resolve |
|---|---|
| Appearance | Does the proposed shade, surface and print appearance meet the approved brief? |
| Measurements and fit | Which fit or coverage decisions need checking with the replacement? |
| Shell and lining | Does the proposed combination need a new physical review? |
| Construction | Must seams, elastic application or other operations be reassessed? |
| Performance evidence | Which agreed requirements need evidence specific to the alternative? |
| Product information | Which specifications, labels or claims would need updating? |
Agree the comparison method and acceptance criteria with the technical team. A hand-stretch check can support a discussion, but it should not be recorded as a standardized test result.

Distinguish a swatch decision from a garment decision
State what you are approving at each stage. Accepting a swatch for color review does not automatically approve the finished garment’s fit, construction or function.
Ask whether the change warrants a sample made with the proposed shell, lining and components. Identify the sizes and features that need checking, then record the sample reference and review results. If a physical sample is needed, keep that approval open until it has been assessed.
Do not reuse evidence for the original material without confirming that it applies to the alternative. Where the order brief includes a particular performance requirement, agree what documentation or testing will support the replacement decision.
Reconfirm the commercial effect
Ask for any changes to price, minimum purchase, material availability, sample work and production timing in writing. Confirm whether any original material has already been purchased and how that stock would be handled.
A faster sourcing option may still require another approval step. Put the proposed material availability and the remaining review work in the same timeline before accepting a revised delivery date.
Release a precise approval
Record the approved alternative, affected styles and colors, governing sample or swatch, specification revision, approver and date. List unresolved items explicitly. A short message saying “okay to use” leaves too much room for interpretation.
Update the working specification and inspection reference together. Keep the superseded version for traceability, with a clear note that it no longer governs those order lines.
For a repeat order, carry the final substitution record into the next enquiry rather than reverting to the earlier material name. The swimwear reorder guide explains the wider product record to retain.
Send Joy Bikini your approved material reference and proposed changes to discuss what needs review before production proceeds.