Siopor ® is the top-of-the range material if your aim is to combine efficent protection and superior comfort.
A waterproof but breathable coating is obtained by a compact Hydrophylic (PU) layer, whereby perspiration is transported in a molecular chemical way from inside the garment to the outside.
This happens under influence of an energy difference between the inside and the outside of the garment, due to a temperature and relative humidity gradient.