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For your three criteria the one that jumps out for me is a silk liner. It's warmth to bulk ratio is going to be the best. You'll prob get a couple of degrees (5C at most) for this. That said, A sl...
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For your three criteria the one that jumps out for me is a silk liner. It's warmth to bulk ratio is going to be the best. You'll prob get a couple of degrees (5C at most) for this. That said, A sl...