The Rab Expedition 1400 -40 Degree Down Sleeping Bag is built for extreme cold with water-resistant Pertex fabrics and hydrophobic 850-fill European goose down. Designed with slightly extra room to fit down clothing, it weighs just over 4.5 lb. Close-fitting neck and face baffles, a collar, and drawcord hood help retain warmth. Flowgate technology in the torso and footbox prevents down migration, reducing cold spots. Includes an internal zippered pocket, anti-snag zipper tape, and a drybag compression sack for weatherproof packing.