A sleeping bag has an elongate shell defining an inner volume sized and shaped to receive a user therein. The shell has a head portion, a foot portion, a middle portion extending longitudinally between the head and foot portions, an overlying portion adapted to overlie the user during use, an underlying portion adapted to underlie the user during use, and a vent. The vent is selectively moveable between a closed configuration and an opened configuration to enable the user to access the exterior of the sleeping bag from within the sleeping bag. The vent comprises an inner panel and an outer panel. The inner panel is positioned in overlapping face-to-face engagement with the outer panel in the closed configuration. The outer panel is spaced from the inner panel in the opened configuration to define a passage to enable the user to extend his or her feet through the vent.