A compression test report is useful only when it can be connected to the garment being purchased and the question the buyer needs answered. A pressure map without sample identity or test conditions may be visually persuasive while offering little support for a product decision.
Start with the identity chain
Match the report’s sample code to style, size, pattern revision, fabric reference, material lot and garment condition. Confirm who selected and supplied the samples. A report on a development garment made from substitute fabric does not automatically apply to bulk production, even if the style name is unchanged.
Check the report date and version. If a corrected report exists, retain the earlier version for traceability but mark which one governs the decision. Where samples were washed, verify the procedure, number of cycles, drying and conditioning before measurement. “After washing” is not enough to reproduce the comparison.
Read the body or form and measurement setup
Pressure depends on how a garment is fitted and measured. Identify the form dimensions or relevant wearer measurements, posture, garment placement and sensor positions. Ask how the garment was donned and whether it was allowed to settle before readings were taken. These details matter when comparing reports.
A result from one form should not be presented as the pressure experienced by every customer within the size range. Ask the laboratory which body ranges, sizes and conditions the plan represents, and which it does not. Where the report uses a sports-textile method, confirm the current method version and the portions actually performed.
Inspect results beyond the colored map
Read numeric values, units, repeat measurements and reported variation as well as the image. Confirm that a color scale is consistent between maps; the same color on two separately scaled figures may represent different values. Ask whether the map shows one specimen, an average or selected locations.
Review any exclusions, deviations and limitations. A report may characterize pressure at named points without assessing the whole garment, long-term wear or medical outcomes. Do not let a marketing summary expand the report’s scope. Ask the lab about uncertainty or repeatability when those affect whether a result is close enough to a specified limit.
Compare only equivalent conditions
For a before-and-after comparison, keep the sample definition, test setup and measurement locations aligned. If a different size, form or posture was used, treat the results as separate observations unless the lab provides a justified comparison. A change in test setup can create an apparent product change.
The same principle applies when comparing two suppliers. Do not rank them by pressure values from unrelated reports. Issue a common test brief and request the same reporting fields, or ask an independent technical reviewer what can validly be concluded from the available evidence.
Report-review worksheet
Use this worksheet to decide whether a report is applicable, incomplete or unsuitable for the current purchasing decision. Record the report section or page behind each answer.
| Review item | Evidence to locate | Reason to request clarification |
|---|---|---|
| Product identity | Style, size, material and pattern revision | Only a generic product name is listed |
| Sample state | New or washed; handling and conditioning | Care history is absent or inconsistent |
| Test setup | Method, form/body dimensions and posture | Conditions differ from the agreed plan |
| Measurement locations | Diagram or reproducible location definitions | Map lacks identifiable points |
| Reported results | Units, repeats, variation and scale | Only a promotional image is supplied |
| Scope | Sizes, specimens and tested conditions | Claim extends beyond tested coverage |
| Decision basis | Approved target and acceptance rule | Pass statement has no defined requirement |
| Limitations | Deviations, uncertainty and excluded conclusions | Summary omits important qualifications |
Example of a defensible review conclusion
Hypothetical example: a supplier submits a report for a medium top in the development fabric, measured before washing on one named form. The report may describe that sample’s measured behavior. It does not approve a revised fabric, the full size range or an after-wash claim. The next action is to test the relevant production-material samples under the agreed plan, not to discard the report or stretch its meaning.
File the review outcome with the product’s claim register. A measured pressure result does not prove faster recovery, better circulation or a treatment effect, and sports apparel should not be presented as a medical device on that basis. Approve only the purchasing decision and wording that the evidence actually supports.
Related purchasing guidance
Continue with How should a compression shirt be specified for gym wear versus recovery wear?, or Choosing a Compression Apparel Factory: A Technical Buyer's Checklist.
