Sierra Design's women's 800-fill, 15-degree ultralight is tailored narrower through the shoulders, with more insulation in the feet and torso. The Spark features Foot Box Venting, a Jacket Hood and a half zipper to save weight. This is the 74" long one. It was listed at 2lbs 2oz with 800 fill. This bag has amazing loft. No damage. $150 shipped.