Abstract: A sleeping bag (10) has a top layer (25) containing insulation and a bottom layer (30) containing insulation. An opening on the head end (15) and an opening on the foot end (20) are wide enough to accommodate a hammock (50). Preferably, these ends and/or the areas around the openings are reinforced. Flaps (310) reduce cold air entering via the openings. Tabs (45A-45D) stabilize the sleeping bag so that it does not slide along the hammock. The hammock is routed through the sleeping bag and connected so that the sleeping bag is suspended. The insulation on the bottom layer is below the hammock and so is not compressed by the weight of the user. This helps to preserve the insulating qualities of the sleeping bag, even when used with a hammock. The hammock rings are connected to available support objects, such as trees or posts.