Primaloft is good stuff, too. It's softer than Polarguard, so it drapes better over the body and to me feels more comfortable. It's very warm, and seems to retain a little more insulating capability when very wet than Polarguard. But it's a little trickier to manufacture a Primaloft bag, so they cost a bit more. Integral Designs' North Twin is a fine Primaloft bag, rated to ten degrees, priced at $220. Like the Snowshoe, it weighs three pounds, eight ounces. From a practical standpoint, I doubt the two bags "real" temperature rating is all that different, as Integral Designs is quite conservative with its ratings. But either bag would work well for you.
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