Quality starts with the product brief
A material is suitable when it meets the needs of the garment and can be made consistently to the agreed specification. Begin with the style, wearer, season, fit, use and care routine; then define composition, construction, weight, width, colour and finish.
A familiar trade name or a high weight is not by itself proof of quality. Hand, opacity, drape, stretch, recovery, surface and dimensional stability all need to be considered together.
Test before a larger production run
Review a representative sample and make a test garment for new or demanding styles. Check the material after relevant washing and finishing, and record the result against a reference sample and agreed tolerances.
A consistent approval process helps the brand, fabric manufacturer and sewing facility work from the same expectations. It can reduce avoidable variation, but cannot eliminate every production risk.
What to include in the specification
Document the intended use, fibre blend, knit construction, target weight and usable width, colour standard, finishing or print route, test method, tolerances, batch identification and delivery requirements. Keep the approved sample with the specification so later batches can be compared.