Abstract: This invention provides an improved sleeping bag convertible into a backpack with reduced complexity and greater ease of use. The sleeping bag includes (1) an elongated flexible bag; (2) a flexible pouch attached to the bag at or near the bag's lower end; (3) left and right shoulder straps, each having a lower section attached to the bag at the bag's lower end and an upper section attached to the bag at a location spaced from the bag's lower end; and (4) a side attachment assembly for releasably attaching the left side edge of the bag to the right side of the bag, adjacent to the pouch. The bag is configured to be storable within the pouch by (a) folding the bag along a central longitudinal axis, (b) folding the bag lengthwise into the pouch via the pouch's open upper end, and (c) attaching the side attachment assembly, after which the sleeping bag can be worn as a backpack on a person's shoulders.