Idea for a UL sleep pad.

[1forcamping]

i used it on its own, mostly in a hammock but it worked in the shelter too its at least as insulating as a ccf pad, and almost as comfortable, they make them in different thickness, i used the thinnest one, i think it was around 2 dollars at walmart, so pick one up and try in out, i thought it worked great for being almost full legth and only 3 or 4 ounces

About how small does this pack?

[Camping Dave]

Why not mate this stuff between two thin layers of closed cell foam so theres no heat conduction

What are you talking about? Space blankets conduct heat quite well. You can easily prove this to yourself by wrapping one layer around your hand and grabbing an ice cube or dipping your hand into hot water.

[Camping Dave]

About how small does this pack?

About down to the size of a windshield reflector

[Rusticus]

i found one that packs down to about the size of thick paperback book