The jack wolfskin exhalation lightweight jacket is jack wolfskin s thinnest and lightest windshell jackets making it ideal for keeping you dry when you are enjoying running trail running cycling and other high intensity and fast paced activities this jacket has been made from jack wolfskin s stormlock fabric which is very thin windproof water resistant and incredibly breathable with a mesh lining making this an incredibly comfortable jacket to wear this jacket has a packaway function so that whe