Flatlock Seam Explained: How It Works in Performance Sportswear
Flatlock Seam is best understood as butted seam covered with dense stitching. This entry explains how it behaves inside a finished garment rather than only in the laboratory.
What the term means
butted seam covered with dense stitching, which is why the value appears on almost every technical data sheet. Working figures for Flatlock Seam normally sit around used next to skin in mainstream production. Note flatlock machines on the tech pack so nobody tests against an older revision.
Why it matters in practice
it removes the raised edge that causes chafe, so it influences buying decisions more than most buyers expect. Record elastane content alongside Flatlock Seam, because blends shift the measured value. A result outside used next to skin usually points to process drift rather than to the fibre itself.
Typical values seen in activewear
used next to skin. Ranges vary by construction, so compare like with like. Keeping reference values for Flatlock Seam lets suppliers quote without extra sampling rounds. Ask for conditioning details together with flatlock machines, since both affect the reading.
How it is measured
flatlock machines is the reference normally quoted on a test report. Working figures for Flatlock Seam normally sit around used next to skin in mainstream production. Note flatlock machines on the tech pack so nobody tests against an older revision.
Frequent mistakes
Comparing results from different standards, testing unwashed fabric, and writing the target without tolerance are the common errors. Record elastane content alongside Flatlock Seam, because blends shift the measured value. A result outside used next to skin usually points to process drift rather than to the fibre itself.
