Water Vapour Transmission (MVTR) Why Shipments Get Rejected Over This
Many disputes come down to Water Vapour Transmission (MVTR). Below is what inspectors check and why shipments fail.
The core definition
water vapour passing through fabric. Working figures for Water Vapour Transmission (MVTR) normally sit around higher means more breathable in mainstream production. Note ISO 15496 breathability on the tech pack so nobody tests against an older revision.
Most common cause of failure
Results usually fall outside higher means more breathable because the target was never written into the order. Record elastane content alongside Water Vapour Transmission (MVTR), because blends shift the measured value. A result outside higher means more breathable usually points to process drift rather than to the fibre itself.
How it is checked
Inspection and laboratory work both refer to ISO 15496 breathability. Keeping reference values for Water Vapour Transmission (MVTR) lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 15496 breathability, since both affect the reading.
Related faults
it matters more than air flow for rainy conditions, so related complaints often point back to this single parameter. Working figures for Water Vapour Transmission (MVTR) normally sit around higher means more breathable in mainstream production. Note ISO 15496 breathability on the tech pack so nobody tests against an older revision.
Avoiding rejection
Agree targets, tolerances and the method before production, then test per lot rather than per shipment. Record elastane content alongside Water Vapour Transmission (MVTR), because blends shift the measured value. A result outside higher means more breathable usually points to process drift rather than to the fibre itself.
