Preshrinking Explained: How It Works in Performance Sportswear
Preshrinking is best understood as relaxing fabric before cutting. This entry explains how it behaves inside a finished garment rather than only in the laboratory.
What the term means
relaxing fabric before cutting, which is why the value appears on almost every technical data sheet. Working figures for Preshrinking normally sit around below 3% residual shrink in mainstream production. Note AATCC 135 verification on the tech pack so nobody tests against an older revision.
Why it matters in practice
it prevents size change after purchase, so it influences buying decisions more than most buyers expect. Record elastane content alongside Preshrinking, because blends shift the measured value. A result outside below 3% residual shrink usually points to process drift rather than to the fibre itself.
Typical values seen in activewear
below 3% residual shrink. Ranges vary by construction, so compare like with like. Keeping reference values for Preshrinking lets suppliers quote without extra sampling rounds. Ask for conditioning details together with AATCC 135 verification, since both affect the reading.
How it is measured
AATCC 135 verification is the reference normally quoted on a test report. Working figures for Preshrinking normally sit around below 3% residual shrink in mainstream production. Note AATCC 135 verification 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 Preshrinking, because blends shift the measured value. A result outside below 3% residual shrink usually points to process drift rather than to the fibre itself.
