The Exped MegaMat is the ultimate 3D sleeping mat with a flat sleeping surface from edge to edge. Its luxurious thickness, stretch tricot top layer and effortless inflation ensure comfort and stability. The 10 cm thick open-celled polyurethane foam makes the MegaMat soft and ideal for side sleepers, and prevents sagging. You can adjust the firmness by adding extra air with the included Top-Up Pump or by removing air via the valve.