Search:

Yes that method gets used a lot also and usually has better results then the space sheet.
The biggest point to keep in mind is that most materials that you could use to insulate under your body lose...

There is no need to apologize. I guarantee your English is better then my German. We are a big happy family here, so we enjoy helping our brothers & sisters find a better way to sleep.

Perhaps you are thinking about insulation? (i.e. keeping you warm)

A lot of folks have tried using them (myself included), and have found them to be too loud, too awkward, too finicky, and too...