[Paddlewise] Emergency Coverings

Anybody have opinions on/experience with cheap, light, emergency coverings:
durability, efficacy, ease of use, etc.?  I'm think of anything from heavy
duty garbage bags (pennies) to "space blankets" (couple of bucks) to very
light space-blanket style bivvies (tens of bucks), and the like.  The
situation is you're out in the bush but you are not near your tent/tarp or
natural shelter but you need more protection than your clothing.

Thanks.

Tom
***************************************************************************
PaddleWise Paddling Mailing List - Any opinions or suggestions expressed
here are solely those of the writer(s). You must assume the entire
responsibility for reliance upon them. All postings copyright the author.
Submissions:     PaddleWise_at_PaddleWise.net
Subscriptions:   PaddleWise-request_at_PaddleWise.net
Website:         http://www.paddlewise.net/
***************************************************************************