Built like a fortress for you hard livin' backcountry types who think nothing of bushwhacking for a couple of hours to get the goods, the Flylow Vector Jacket features 150 denier fabric construction and 20K / 20K waterproof breathable performance to keep you out and playing no matter how tough the conditions. With 80 grams of Greenloft™ recycled Polyester insulation, the Vector is your go-to when the temps dip low, too.