The jack wolfskin exhalation texapore jacket is one of jack wolfskin s lightest weatherproof shell jackets making it ideal for keeping you dry when you are enjoying running trail running cycling and other high intensity activities this jacket has been made from jack wolfskin s texapore 022 5l fabric which is very thin and stretchy and offers you an excellent waterproof rating of 20 000mm while being incredibly breathable too so when you start to sweat it expels moisture vapour very effectively