Micro has a particular meaning in science: 10^-6 or on millionth. So how does that apply to fibre? It turns out that the fibres have a diameter of less than 10 micrometres so I wouldn't be able to measure that with a micrometer screw gauge. I guess that the small diameter gives the fibres a much bigger surface area when woven like this so that more water can bind to the surface, It says that the polyamide content, which is 12% on this white part of this cloth, due to hydrogen bonding. Looks like this has opened up a whole new area of interest!
