Water vapour permeability tester | |
What does it test:
It tests the quality of
material to water vapour permeability, i.e. how strongly material allows water
vapour to go through it. | |
Why is it important: Feet get warm and humid during long walk or run, which causes the vapour occur. If material does not allow the vapour to go through it, the feet get sweat, humid and cold, which reduces the comfort and pleasure of wearing. Therefore material must allow certain degree of water vapour permeability. |