Interlock Explained: How It Works in Performance Sportswear
Interlock is best understood as two single jersey fabrics knitted back to back. This entry explains how it behaves inside a finished garment rather than only in the laboratory.
What the term means
two single jersey fabrics knitted back to back, which is why the value appears on almost every technical data sheet. Working figures for Interlock normally sit around 200-280 GSM in mainstream production. Note interlock machine on the tech pack so nobody tests against an older revision.
Why it matters in practice
it is thicker, stable and popular for squat-proof fabric, so it influences buying decisions more than most buyers expect. Record elastane content alongside Interlock, because blends shift the measured value. A result outside 200-280 GSM usually points to process drift rather than to the fibre itself.
Typical values seen in activewear
200-280 GSM. Ranges vary by construction, so compare like with like. Keeping reference values for Interlock lets suppliers quote without extra sampling rounds. Ask for conditioning details together with interlock machine, since both affect the reading.
How it is measured
interlock machine is the reference normally quoted on a test report. Working figures for Interlock normally sit around 200-280 GSM in mainstream production. Note interlock machine 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 Interlock, because blends shift the measured value. A result outside 200-280 GSM usually points to process drift rather than to the fibre itself.
