I want to second the vote for a siliconized tarp. Recently on one of our rescues, the pack that has the patient packaging gear (blanket, plastic for vapor barrier, helmet, etc.) did not make it up to the moutain to the scene. One of our members pulled out of his pack a siliconized tarp that was compact and lightweight. It was perfect for our needs. Our only concern was retrieving the tarp from the trauma center, as this was a helicopter evac and his name was not on the tarp. Fortunately with a few phone calls he was able to retrieve the tarp. When I asked him where he purchased it and the cost, he said it came from a Canadian co-op(Mountain Equipment Co-op), more like what REI used to be, with the exchange rate it ran around $35.00 USD. Here is the web site if you are interested. Pete

http://www.mec.ca/Products/product_detai...D=1043419340941