Answers are grounded in this paper and cite their sources.
An apparatus has been constructed to measure the water vapor resistance of textiles and other permeable fabrics. The samples are sandwiched between microporous mem branes but are not compressed. The reliability of the apparatus is shown by measuring the vapor resistance of air layers. In practice, a textile sample can be tested within half an hour with an accuracy of 1% or better.
No takes yet. Share an insight, caveat, or question.
Beest et al. (1986) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: