Luxurious warmth in a sleeping mat, the Exped DownMats are also very comfortable, compact and compress well due to the down fill. Inner baffles reduce heat transfer to keep you warmer and make for a stable sleeping surface while the thickness of the mat smooths out uneven ground. And to top it off, Exped's integrated pump makes inflation easy. The DownMat 9 is thicker and will provide more warmth than the DownMat 7.