GORE-TEX is certainly the best known brand of high-performance, waterproof and breathable textile..... GORE-TEX: it has three layers of fabric, with a backing fabric on the inside, a wicking Teflon-type (PTFE) membrane in the middle to draw moisture away, and a water-repellent outside. SympaTex is quite different. Instead of having micropores, like GORE-TEX and eVent, it uses what's called a copolymer, made of hydrophobic polyester and hydrophilic polyether. The polyester repels water from the outside..All very clever stuff.
This inner linner is suitable to a Rukka Jacket Euro size 50