Four-Way Stretch Explained: How It Works in Performance Sportswear
Four-Way Stretch is best understood as extension in both length and width. This entry explains how it behaves inside a finished garment rather than only in the laboratory.
What the term means
extension in both length and width, which is why the value appears on almost every technical data sheet. Working figures for Four-Way Stretch normally sit around 30-60% typical extension in mainstream production. Note ISO 13934-1 cyclic extension on the tech pack so nobody tests against an older revision.
Why it matters in practice
it defines how freely a garment moves, so it influences buying decisions more than most buyers expect. Record elastane content alongside Four-Way Stretch, because blends shift the measured value. A result outside 30-60% typical extension usually points to process drift rather than to the fibre itself.
Typical values seen in activewear
30-60% typical extension. Ranges vary by construction, so compare like with like. Keeping reference values for Four-Way Stretch lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 13934-1 cyclic extension, since both affect the reading.
How it is measured
ISO 13934-1 cyclic extension is the reference normally quoted on a test report. Working figures for Four-Way Stretch normally sit around 30-60% typical extension in mainstream production. Note ISO 13934-1 cyclic extension 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 Four-Way Stretch, because blends shift the measured value. A result outside 30-60% typical extension usually points to process drift rather than to the fibre itself.
