Squat-Proof Opacity Explained: How It Works in Performance Sportswear
Squat-Proof Opacity is best understood as resistance to becoming see-through under stretch. This entry explains how it behaves inside a finished garment rather than only in the laboratory.
What the term means
resistance to becoming see-through under stretch, which is why the value appears on almost every technical data sheet. Working figures for Squat-Proof Opacity normally sit around above 96% opacity in mainstream production. Note AATCC 183 transmission with photography on the tech pack so nobody tests against an older revision.
Why it matters in practice
it is the most common reason leggings are returned, so it influences buying decisions more than most buyers expect. Record elastane content alongside Squat-Proof Opacity, because blends shift the measured value. A result outside above 96% opacity usually points to process drift rather than to the fibre itself.
Typical values seen in activewear
above 96% opacity. Ranges vary by construction, so compare like with like. Keeping reference values for Squat-Proof Opacity lets suppliers quote without extra sampling rounds. Ask for conditioning details together with AATCC 183 transmission with photography, since both affect the reading.
How it is measured
AATCC 183 transmission with photography is the reference normally quoted on a test report. Working figures for Squat-Proof Opacity normally sit around above 96% opacity in mainstream production. Note AATCC 183 transmission with photography 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 Squat-Proof Opacity, because blends shift the measured value. A result outside above 96% opacity usually points to process drift rather than to the fibre itself.
