The Ascent™ down mummy sleeping bag redefines what versatile means in a sleep system. Complex construction and high-quality down keep you warm when it’s cold outside, while the triple-zipper Free-Flow Zip™ system ensures you stay cool and ventilated when the weather warms | Shaped to allow a natural sleeping position for comfort, the Ascent is light and compact enough to go everywhere your adventures may take you | ULTRA-DRY Down 750  Loft 90% Down Cluster Premium Duck Down certified Responsible Down Standard (RDS) | Thermolite® insulation in the foot section warms your feet instantly | Includes lightweight Ultra-Sil™ compression bag and storage cell | Long fits up to 6'6"