Es Tresidder snuggles up in style in Patagonia, on a partially down-filled inflatable mattress: the Exped DownMat 7 pump.
"...When I first unravelled it at base camp my team mates laughed at how ineffective this pumping system seemed to be. This turned out to be an illusion however, because after only a few minutes they were all suffering serious envy as the inflatable mats they'd previously considered luxury looked a little underfed next to my behemoth..."
Read more at http://www.ukclimbing.com/gear/review.php?id=2282