Basecamp Guru - MVTR and Breathability
May 13, 2020
MVTR stands for moisture vapor transmission rate. It
measures the rate at which moisture permeates through a fabric measured
in grams/meter /day. As it turns out though, this is a very hard
measurement to make and therefore figures should be used as a rough
guide only.
The difficulty of making the measurement is why some
manufacturers won't quote figures for this factor - and even an ac
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