Air Permeability Explained: How It Works in Performance Sportswear
Air Permeability is best understood as volume of air passing through fabric. This entry explains how it behaves inside a finished garment rather than only in the laboratory.
What the term means
volume of air passing through fabric, which is why the value appears on almost every technical data sheet. Working figures for Air Permeability normally sit around 50-500 mm/s depending on structure in mainstream production. Note ISO 9237 air permeability on the tech pack so nobody tests against an older revision.
Why it matters in practice
it controls wind protection and cooling, so it influences buying decisions more than most buyers expect. Record elastane content alongside Air Permeability, because blends shift the measured value. A result outside 50-500 mm/s depending on structure usually points to process drift rather than to the fibre itself.
Typical values seen in activewear
50-500 mm/s depending on structure. Ranges vary by construction, so compare like with like. Keeping reference values for Air Permeability lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 9237 air permeability, since both affect the reading.
How it is measured
ISO 9237 air permeability is the reference normally quoted on a test report. Working figures for Air Permeability normally sit around 50-500 mm/s depending on structure in mainstream production. Note ISO 9237 air permeability 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 Air Permeability, because blends shift the measured value. A result outside 50-500 mm/s depending on structure usually points to process drift rather than to the fibre itself.
