Big Agnes Down Comforter Works with any pad size and is compatible with most couches, dorm room beds, inflatable mattresses, etc Big Pine may be used zipped closed as a sleeping bag or unzipped as a comforter Two Big Pine sleeping bags may be zipped together to create a two person sleeping bag Down and Synthetic Comforters are ideal for home, tent or truck use Down and Synthetic Comforters may be used on top of another sleeping bag (adult or kids) to increase insulation