A blanket style 15 degree sleeping bag (I chose to have 4oz of overfill at the factory to extend it to 0F) that will truly keep the cold out. The Katabatic attachment system, down filled collar, and draft blocking foot box closure guard you from the cold.When you need some ventilation, the zippered foot box allows you to completely open to a blanket. The options in between are endless, and create a truly flexible sleep system. 4oz of overfill was added at the factory for extended temperature range to a 0F bag. 2mm Cords for attaching to your pad (comes with extra cord). Puffy goose down overfill Parkasite puffer puffy duvet nylon silky soft mountain hardwear north face Montbell helley Hansen Montbell mummy marmot. The item "Katabatic Gear Ultralight down quilt sleeping bag with 4oz overfill to extend 0F" is in sale since Thursday, February 25, 2021. This item is in the category "Sporting Goods\Outdoor Sports\Camping & Hiking\Outdoor Sleeping Gear\Sleeping Bags". The seller is "sportngoods" and is located in Portland, Oregon. This item can be shipped to United States.