展开The Kelty Womens Cosmic Ultra 20 is the ultimate in a lightweight mummy. Kelty has taken their top-selling Cosmic Bag and added a womens specific 800 fill DriDown version, with all the perks too. The new trapezoidal baffle construction improves is ideal for retaining heatand its just one of the reasons Cosmic is still Keltys favorite three-season superstar. They also love the natural-fit foot box for happier feet, and a PFC-free water-repellent coating for a healthier environment. What makes it a womens bag? Its designed for and tested to womens specific ISO standards. Studies show that women sleep colder than men. So, in addition to narrower shoulders, wider hips and a shorter torso, Keltys womens bags have extra insulation in the upper body and footbox.