What material does everyone use for a emergency shelter?:ylsmoke:
That got you through your SAR Tech II test? I like the looks of it and they are $8My large kit is basically a backpack that I have an emergency tent in exactly like this one: http://www.campmor.com/outdoor/gear/Product___23006
Another recommendation on the Tyvek house wrap. You can usually get a scrap of it from a construction site for free or cheap. It's waterproof and very light. You can also sew it on a home sewing machine.I keep a roll of this stuff in each of my packs for climbing and skiing. http://www2.dupont.com/Tyvek/en_US/index.html
It's almost weightless and protects against rain and wind, makes a good ground cloth too. My dad was doing some work on his home and he had a bunch left over. It has come in handy on several occasions. I used it last year during a week long backpack trip in the Sierra Nevada. The only drawback is that it is a little noisy. Don't know what the cost is but if you can get your hands on some it makes a great material for shelter.