Insul Mat Max-Compact by Pacific Outdoor Equipment

Insul Mat Max-Compact by Pacific Outdoor Equipment

This is by far the best deal in sleeping pads. It weighs less than a pound, costs $35, and is a whole 2 inches thick. The only drawback is that you have to blow it up yourself (takes ~3 minutes). Combine with a closed-cell foam pad ($5 at your local army surplus store only a couple of ounces) for insulation.