Test used to measure the ability of a material, typically used in footwear, to allow water vapor to pass through it. This test assesses how well a material can breathe, meaning how effectively it allows moisture vapor (such as sweat) to escape from within the footwear.
In this test, a sample of the material is placed between two chambers. One chamber has a higher humidity level, while the other has a lower humidity level. The rate at which water vapor passes through the material from the higher humidity chamber to the lower humidity chamber is measured. This provides information about the material’s water vapor permeability.
The test is essential for evaluating the breathability of footwear materials, which impacts the comfort of the wearer’s feet. Footwear that effectively allows moisture to escape can help prevent discomfort, odor, and other issues related to excessive moisture buildup within the shoe. The results of this test help to select materials that strike a balance between keeping feet dry and maintaining the footwear’s overall performance.