In terms of comfort, I’ve found the Exped Downmat 9 to be tops. A close second, lighter weight, and nearly as comfortable, is the Thermarest NeoAir XTherm MAX. Both are air mattresses, which maximize comfort for the weight and bulk.
^this .... Expend Downmat 9 has been my most comfortable. I use Thermarest Neoair xtherm max now - it is lighter weight and works great for side sleeper.... just not quite as comfortable as the Exped dm 9.
