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- Feb 28, 2007
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Great stuff Ken!
You probably were not able to tell on this trip, but in general, do you feel warmer when using the heavy duty space blanket as a ground sheet?
Its really hard to say whether the reflective coating makes any real difference in this situation or not. I take it on faith that it does, albeit my bag is black and presumably absorbs most of the IR my body radiates, so between that and the pad, I'm not sure how much IR actually makes it to the blanket to be reflected back.
The tarp as a ground sheet offers many other possible alternative functions on a trip like this. The groundsheet function is very important with the tarp. It gives me an area that is clean of snowdrift and allows me to organize my stuff and not get them full of snow. Placed over natural insulation materials, the tarp provides added protection to prevent my pad from getting punctured or getting full of resin if on spruce boughs.
Outside of the groundcloth function, the tarp can be used to help secure pack contents on my sled. It could be used as a makeshift poncho or windbreak when the wool isn't fully cutting high winds and of course for its intended emergency blanket function. So I see the heavy tarp with reflective coating as a really versatile piece of kit that is especially useful in winter and cold weather camping. They cost about $13, so there really isn't much to not like about them other than they are much bigger in bulk and volume than a mylar/heat sheet one.