A 500-piece run of lace bodysuits came back with every snap positioned 3 mm off the tech pack. The factory had graded the pattern from a sample that was never measured for snap placement, and the buyer only caught it after the first 200 units were sewn. That omission, not fabric quality or stitching, is what turned a routine order into a rework. When you evaluate a bodysuit manufacturer, the questions that matter are not about style or price. They are about how the factory holds measurements, how it verifies them, and what it does when a spec is missing. This article walks through the specs that separate a competent run from a costly one.
The Snap Placement Problem
Snap placement is the most common hidden defect in bodysuits, and it is almost always a grading issue. A tech pack that specifies snap position only on the size-small sample leaves the grader to interpolate for larger sizes. Most mid-size China factories grade snaps proportionally with the body pattern, which shifts the crotch snaps outward by 2 to 4 mm per size. That shift changes how the garment sits and can cause the snaps to pull under tension. Specify snap placement as a fixed measurement from the center front seam for every size, and require the factory to submit a graded spec sheet before production.
If the factory cannot produce a graded spec, that is a reason to pause, not negotiate.
Crotch Construction and Lining
The crotch area determines both comfort and durability. A cotton gusset is standard, but its width, length, and stitch type must be specified. A 4-thread overlock on the gusset edge is typical, but a flatlock seam is stronger and reduces bulk. The lining fabric weight should be called out in grams per square meter (GSM); 120 GSM cotton is common, but 140 GSM holds shape better after washing. If the factory does not ask about GSM, it is likely using whatever is in stock. Ask for a swatch of the lining before bulk cutting, and confirm the fiber content. A blend with less than 95% cotton will pill and trap moisture.
Stretch and Recovery
Bodysuits depend on elastane for fit. The percentage of elastane should be specified, but more important is the recovery test. A fabric that stretches but does not return to its original length within 30 seconds will lose shape after one wear. Ask the factory to perform a 24-hour stretch recovery test on the bulk fabric roll, not just the sample. If the factory has no testing protocol, you can specify that the fabric supplier’s test report must accompany each shipment. Recovery below 85% is a red flag. The factory should also be asked whether the elastane is bare or covered. Covered elastane resists degradation from chlorine and sweat, which matters for activewear bodysuits.
Measurement Tolerance and the Spec Sheet
Every measurement on a tech pack has a tolerance, but not every factory honors it. The tolerance for critical points—crotch length, bust, and hip—should be ±0.5 cm. For non-critical points like hem width, ±1.0 cm is acceptable. The spec sheet should list each point of measure (POM) with a diagram, the target, and the tolerance. Ask the factory to send a completed spec sheet with actual measurements from the first production run, not the sample. If the factory only sends sample measurements, it has not verified the production run. A manufacturer that cannot produce a completed production spec sheet within 48 hours of cutting is not managing quality; it is reacting to it.
What to Ask the Factory
The evaluation process is not about finding a factory that says yes to everything. It is about finding one that asks the right questions. A competent bodysuit manufacturer will ask about snap placement grading, lining GSM, and stretch recovery. It will request a graded spec sheet and offer to send a top-of-production sample. It will not promise a 7-day turnaround for a first order without explaining the risk of skipping steps. The best factories are not the cheapest; they are the ones that treat your tech pack as a contract, not a suggestion.
When you choose, weight the factory’s questions more heavily than its price quote. A factory that asks about snap grading is worth more than one that quotes 20% lower and says nothing.
What to send us
If the specifications above match what you are sourcing, send your tech pack to Orange Sea Clothing. If the pack is not written yet, sketches and a reference sample are enough to start — sample development covers the design review, fabric and trim sourcing, pattern making and the first prototype, so you see fit and construction before you commit to a production run.
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