Sportful hot pack norain ultralight jacketthe worlds lightest windproof water repellent shell jacket this hot pack ultralight jacket is constructed from a revolutionary 7 denier microfibre fabric for exceptional protection at an unprecedented 50g and tiny pack size the exceptionally small yarns are woven incredibly tightly providing complete wind chill protection at an astonishingly low bulk the fabric is also treated with a dwr water repellent finish that results in most of the rain runni