Dynafit knows about making lightweight ski touring and ski mountaineering gear as much as anyone, so the Vulcan Women's Hooded Down Jacket's insane warmth to weight ratio shouldn't be surprising. Somehow, though, it's still tough to believe that the Vulcan weighs under 13oz. It's loaded up with super warm and lofty Downtek down, which traps heat and stays warm even if it gets wet, unlike traditional down, so soggy snow won't spell the end of your warm afternoon. The elastic hem, cuffs, and hood binding prevent heat from escaping and drafts from entering, and a series of three pockets keeps your small ski gear where you can find it. Of course, all this warm down and storage space is predicated on a killer fabric. In the case of the Vulcan, it's Polarlite, a tough, light, and packable polyester that stands up to tree branches, the occasional rock, and the general wear and tear of touring and travel. It's lined with nylon taffeta, which resists the escape attempts of down and has a smooth face for easy layering, and finished with stretchy Polarlite Microwaffle side panels for killer mobility, because you never know when you'll need to bust out some quick climbing moves or a celebratory first descent dance.