Abstract: A portable outdoor sleeping system is provided which includes a shelter portion, a detachable ground cover sheet, and one or more detachable sleeping bags. Each sleeping bag includes an elongate perimeter flap to which a fastener element is fixed for use in detachable securement of the sleeping bag to a fastener element of a corresponding sleeping bag outline flap. The sleeping bag outline flap defines a predetermined sleeping bag placement position such that other portions of the ground cover sheet may be reserved for a different use. The system also includes an inflatable cushion which has a projecting strip for use in securing the cushion to the floor.