U.S. Military Original M-1949 Mountain Down Sleeping BagU. S. Military Original M 1949 Mountain Down Sleeping Bag Issued since just after World War 2, the M1949 sleeping bag had over a 30 year service life. The design is extremely similar to the ones used in the war. The mummy shape allows for more heat retention and the foot and head design gives you plenty of room if you need it. A hard to find item in very limited quantity. Down and poly fill Regular Size Stamped U. S. Mountain Various dates and