nylon Women’s 48-degree Fahrenheit (9-degree Celsius) ultralight down sleeping bag for warm weather backpacking, bike packing, and touring; contoured mummy shape features hood and zipper draft tubes 850 fill power down insulation (Responsible Down Standard certified) treated with ULTRA-DRY Down to improve reaction to moisture, retaining loft and performance Women’s design features shorter length, narrower shoulder, and wider hip to increase thermal efficiency; down chambers are mapped to a woman’s physiology to maximize warmth Ultralight 10D nylon shell with 7D liner fabric for minimal weight and bulk; one-third length, right-side YKK zipper Regular size bag has a max user height of five feet seven inches; bag weighs 0.8 pounds; compresses to 1.6 liters with included Ultra-Sil compression sack The Sea to Summit Women’s Flame 48-Degree Ultralight Down Sleeping Bag is a technical down bag for backpacking, bike packing, and touring. The contoured mummy style features a shaped hood and zipper draft tubes to keep the cold out and the warmth in. High-loft, 850 fill power down insulation (Responsible Down Standard certified) is treated with proprietary ULTRA-DRY Down to improve reaction to moisture, retaining loft and performance in rugged conditions. Women’s-specific design features include a shorter length, narrower shoulder, and wider hip to eliminate dead space and increase thermal efficiency; down chambers are mapped to a woman’s physiology to maximize warmth. The ultralight 10D nylon shell with 7D liner fabric offers cutting-edge packability and warmth. A weight-saving YKK zipper is one-third length, on the right side. The Sea to Summit Flame Women’s Ultralight Down Sleeping Bag is available in two sizes: Regular (max user height of five feet seven inches) and Long (max user height of six feet). Includes compression sack and storage cube. Sea to Summit products are guaranteed against defects in materials or workmanship for the lifetime of the product.