Wicking tests help workwear buyers understand how a fabric transports liquid, but the result only has meaning when its direction, method, specimen details, and conditioning state are clear. Compare vertical movement to specified distances separately from horizontal spread, then approve against the garment’s intended use rather than treating one report as proof of drying, safety, or overall comfort.
What wicking means in a workwear fabric decision
Wicking is liquid movement through or along a textile structure. In a work shirt, polo, base layer, lining, or lightweight trouser, a buyer may care about whether liquid spreads away from a localized area, moves upward against gravity, or moves across a surface. Those are related observations, but they are not interchangeable.
The practical procurement question is not simply, “Does this fabric wick?” It is: “What liquid movement is relevant to this garment, in which direction, after which care state, and compared with which approved benchmark?” A useful answer needs a report that lets the sourcing, product, and quality teams read the result consistently.
AATCC identifies TM197-2022 as a method for evaluating liquid transport along and/or through vertically aligned woven, knitted, or nonwoven specimens, expressed as vertical wicking rate to specified distances. AATCC TM197 A separate AATCC method, TM198, addresses horizontally aligned textile specimens and records the observed, timed progression of liquid area at specified intervals. AATCC TM198
That distinction gives buyers a sound starting point. Vertical and horizontal reports can both inform development, yet neither should be substituted for the other.
Vertical rate versus horizontal wicking
Vertical wicking: movement to specified distances
A vertical result is useful when the buyer needs to understand liquid movement in a vertically oriented specimen. The report should identify the specified distances used by the applicable method and state the individual results, not only a broad “pass” statement. A result measured toward specified distances answers a different question from a report that describes a wetted area.
For workwear, vertical information may be relevant when comparing candidate knits for shirts or base layers, or when a team wants to understand whether a fabric construction behaves differently along its length and width. It can also reveal why two materials with similar marketing descriptions should not be considered equivalent.
Do not assume that a faster or farther vertical movement is automatically better. The buyer has to decide whether the intended garment needs localized liquid distribution, controlled movement, or a different performance priority altogether. A fabric that transports liquid readily is not thereby proven to dry faster, feel cooler, remain waterproof, or meet any PPE requirement.
Horizontal wicking: spread across a plane
Horizontal wicking examines liquid travel in a horizontally aligned specimen. The AATCC summary describes the result as a rate based on observed, manually timed liquid area at specified intervals. AATCC TM198 This can be informative when the development team is comparing how candidate fabrics spread a liquid event across a plane.
A horizontal result should be read as a fabric-specific observation under the reported conditions. It does not predict what a finished garment will do at a shoulder seam, under a logo transfer, around a pocket bag, inside a multilayer collar, or while compressed by equipment.
Why direction must remain visible in every comparison
A decision sheet that mixes vertical and horizontal values in one unlabeled column creates false comparability. Keep these fields separate:
- Method name and edition.
- Test direction: vertical or horizontal.
- Fabric orientation: lengthwise, crosswise, or another stated direction.
- Fabric face and back, where relevant.
- Individual specimen results and any summary calculation supplied by the laboratory.
- Conditioning and care state.
- Sample identification, color, finish, lot, and construction.
If the report does not make these fields easy to see, request clarification before using it as an approval document. The goal is not to make reports look uniform; it is to prevent a team from approving unlike evidence as though it were equivalent.
Read the report before discussing a target
Buyers sometimes ask a supplier to meet a single universal height, time, or spread target. That approach is risky without an internally approved performance rationale and a matching method. A value has no procurement meaning unless everyone agrees on what it represents.
Start with the method edition. A method title alone is not enough, because the edition tells the team which named procedure the laboratory says it used. For vertical testing, the available AATCC source identifies TM197-2022 and its focus on rate to specified distances. AATCC TM197 For horizontal testing, the available AATCC source identifies TM198-2011e3(2020)e. AATCC TM198
Next, confirm whether the submitted fabric is greige, finished, garment-washed, or otherwise treated. A finish, print, coating, lamination, brushing process, or care cycle can change how liquid interacts with a surface. The buyer does not need to predict the direction of change; the buyer needs the submitted state to match the approval state.
Then look at the specimen orientation. Warp and weft in a woven fabric, or course and wale in a knit, can behave differently. If the end use allows panels to be cut in multiple directions, the specification should say which orientations need evidence and how the results will be judged.
Finally, read the individual results. A summary number can hide variability. Individual readings allow a buyer to see whether a fabric appears consistent across the tested pieces and whether the claimed comparison rests on a meaningful body of reported observations. When a report leaves uncertainty, request the original lab record or a clearer report rather than filling gaps with assumptions.
A decision framework for workwear buyers
Use wicking evidence as one input in a fabric approval matrix, not as a standalone product claim. The matrix should be built around the wearer, job setting, garment construction, and product promise.
Define the use case first
A warehouse polo, a hot-weather service shirt, a lined jacket, and a protective coverall do not have the same liquid-management question. Write a brief use-case statement that names the garment category, expected wear layer, climate or work context, and the problem the textile is intended to address. Keep it operational. “Everyday uniform knit for active indoor staff” is more useful than “high-performance comfort fabric.”
For protective programs, keep wicking separate from safety compliance. A wicking report does not establish flame resistance, arc protection, chemical resistance, high visibility, waterproofness, or other protective performance. These claims need their own appropriate evidence and approval path.
Choose the relevant evidence
Use vertical evidence when the buyer’s question concerns transport in a vertically aligned specimen and specified-distance results. Use horizontal evidence when the question concerns liquid spread across a horizontally aligned specimen. Request both only when each answers a real design or product-positioning question.
A buyer comparing two fabrics should put like beside like: same method edition, same direction, comparable care state, comparable face/back designation, and clearly identified samples. If any of those inputs differ, treat the reports as contextual information rather than a ranking.
Set approval language that a team can enforce
Instead of promising a universal result, write product-specific acceptance language. For example, the specification may require a named method edition, defined test direction, fabric orientation, care state, complete report, and agreed internal comparison baseline. That is enforceable without pretending that one number fits every workwear program.
When an existing approved fabric is available, a controlled side-by-side comparison is often more useful than an arbitrary industry target. Record why the incumbent fabric is the benchmark: wearer feedback, prior product positioning, field suitability, or consistency with the collection. The benchmark remains a buyer choice, not proof of a universal performance standard.
Keep fabric laboratory evidence separate from garment assessment
A fabric report concerns the submitted material under its reported conditions. A finished garment introduces seams, thread, seam tape, pocketing, facings, interlinings, labels, decorative applications, linings, and body-panel placement. Fit and body movement can also change how a wearer experiences moisture.
This means a fabric can be acceptable on a laboratory report while the sample garment still needs review. Inspect whether the chosen fabric face is outward where intended; whether reinforcement panels or contrast fabrics interrupt the intended effect; whether pocket bags create unwanted layers; and whether trims or decoration cover relevant zones.
Conduct garment construction and wear assessment as a separate, documented approval activity. It should not be presented as a replacement for the laboratory result, nor should a fabric report be used to skip sample review. For custom programs, Sample Development can provide the stage for confirming material selection, panel placement, construction, branding, and fit together.
A numbered approval workflow
- Define the garment and user scenario. Identify the garment type, layer, wearer activity, and the liquid-management question being evaluated.
- Write the evidence request. State whether vertical, horizontal, or both directions are needed; name the approved method edition; and require sample identification, orientation, face/back, care state, individual results, and laboratory conclusion if supplied.
- Lock the submitted fabric identity. Match the report to the material specification: construction, fiber content as specified, color, finish, lot reference when available, and intended garment face.
- Compare only compatible reports. Place candidate results beside an approved control or each other only when method, direction, orientation, and care state are comparable.
- Review variation before averages. Read individual results and resolve missing units, unclear intervals, or unexplained differences before the team makes a commercial decision.
- Approve the fabric conditionally. Record the decision as approved, rejected, or approved pending garment sample review. Preserve the exact report version with the technical package.
- Assess the garment separately. Review a representative sample for construction, panel placement, pockets, lining, decoration, and wearer-relevant behavior. Capture feedback as garment assessment, not laboratory proof.
- Control changes. If the fabric construction, finish, color system, face/back use, or care process changes, decide whether the original evidence still applies or whether new evidence is needed.
RFQ questions and red flags
A serious RFQ asks for evidence that can be compared, not a vague assurance that the fabric is “moisture wicking.” Ask suppliers to identify the applicable test method and edition, test direction, specimen orientation, submitted material state, laboratory report date or reference, individual readings, and whether the fabric tested is the same as the proposed production construction and finish.
Ask how the fabric will be used in the garment: which side faces outward, whether it is combined with another fabric, where labels or logos sit, and whether a wash or finishing process will be applied after sewing. For programs with a preferred control fabric, provide a swatch or a fully defined specification so the supplier is not asked to reverse-engineer a claim.
Red flags include a report without method edition, a vertical result described as horizontal performance, an average with no visible individual readings, an unnamed fabric sample, an unreported care state, or a claim that wicking proves quick drying, breathability, water resistance, or PPE protection. Another warning sign is using a photograph of a workwear garment as evidence that a specific SKU passed a test. Images can show an application; they do not establish a test result.
Compact buyer checklist
Before approval, confirm the following:
- The test answers a stated garment-use question.
- The method edition and direction are explicit.
- Vertical results to specified distances are not compared as though they were horizontal spread results.
- Specimen orientation and fabric face/back are identified.
- Care state and submitted fabric identity match the intended approval state.
- Individual results are available and understood.
- Fabric evidence is filed separately from garment construction and wear assessment.
- Product claims do not extend beyond the evidence.
- Any protective or waterproof claim follows its own evidence path.
Buyer FAQ
Is vertical wicking the same as horizontal wicking?
No. Vertical testing concerns liquid transport in a vertically aligned specimen to specified distances, while horizontal testing addresses liquid spread through a horizontally aligned specimen. Compare each only with evidence from the same relevant direction and method context.
Does a better wicking result mean the garment dries faster?
No. Wicking and evaporative drying are different properties. A wicking report can inform liquid transport in the tested fabric, but it does not by itself establish drying time for a finished garment.
Should we require both tests for every workwear fabric?
Only if both answer a defined product question. Requiring unnecessary reports adds paperwork without improving the approval decision. Match the evidence request to the garment’s use and positioning.
Can a lab report approve the finished garment?
Not by itself. The report concerns a fabric specimen. Evaluate the garment separately for panel placement, seams, pockets, layers, trims, decoration, fit, and intended wearer use.
Can a wicking report support an FR, arc, waterproof, or PPE claim?
No. Wicking evidence is not proof of those properties. Each protective or waterproof claim needs the appropriate separate testing, certification, or compliance evidence for the program.
Make the evidence usable in development
For help translating a workwear brief into a sample-ready specification, discuss your project with Veelianpro. Request a Workwear Quote with the garment category, fabric construction, intended use, and the exact evidence you need reviewed.
