DESC: "Welded, with new ThermicMicro? for outstanding compressibility and durability, the women?s UltraLamina is an excellent choice for damp, cool conditions. Consistently dense insulation maintains loft through repeated washings and compression cycles, and the women?s specific cut increases insulation in the torso and footbox. Dual side zips allow the user to sit up and read or cook while staying inside the bag."