Interesting. I tried the "space blanket"(bag) thing some time ago, and sort of decided their real virtues were lack of weight and bulk, with anything else far behind.
I agree. I keep an aluminized mylar blanket in a pocket of every jacket and coat I own. I don't use the "Space Blanket" brand, because they don't come folded flat, but in a bulkier fold, and, thus, don't fit in a pocket so well.
I found "sleeping" in the cold with them slightly more comfortable than dying. Maybe.
As long as I'm clothed, I find them not bad. Any exposed skin sticks to the material and adds to the noise and discomfort.
I find the Thermo-Lite stuff far more useable:
[link]Still pretty cheap and small (stuff bag pictured is not to scale- check specs). Not perfect, but it's much more comfortable and vastly more durable.
I absolutely agree. Quieter too.
I wonder how they'd do in the water? They are somewhat more permeable, which might be a slight negative, but they might be durable enough to actually work in real-world conditions.
Mine has velcro holding it together on part of some of the edges. It's broken strips; not continuous. That would let a lot more water exchange.
I realize now I should have done a comparison test with a trash bag borrowed from my friend. <img src="/images/graemlins/shocked.gif" alt="" /> D'oh! That would have given me an idea of how important the heat reflection is to warming the water, as opposed to merely trapping the water. I have my assumptions, but I'd rather have tests. <img src="/images/graemlins/frown.gif" alt="" /> Drat.
Stay safe,
J.T.
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