A little piece makes a good sit pad and nice extension for a TR 3/4 length pad. It's also nice to "line" the pack with it. Makes the pack a big open cylinder so I can just throw all my stuff in there.

As far as sleeping I just got a POE Ether pad...gasp...I know it's heavy. Had the best sleep I have ever gotten out in the woods on my last trip. Looks like I'll be retiring the Thermarest/blue pad combo for 3 season use at least. And to all those wondering I am 35. I thrash when I sleep and spend most of my night on my side. The TR just didn't cut it, I used to wake up with my hip joints stinging and my arms asleep.