Synthetics? Leave them for the nightclub.
Gun, Nomex *ARE* synthetics!
As are Kevlar, Aramid, glas fibre aso.
Go have a look at all modern fire fighter proctections, they are all synthetics. Cotton is a thing of the past, forget it.
I agree that the Polyamids (Nylon, Perlon, Viscose...) you normally buy at H&M are not of the properties of the above mentioned techincal clothes, but please go away with your outdated opinion that there is something dangerous about micro fibres. It's simply not true and compared to the alternative, cotton, they have much more advantages.
Dani