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It's not clear what you think the layer principle, is but you don't have to dress in layers. It's the performance of the complete stackup that matters. In cold weather, this could be achieved, fo...
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#1: Attribution notice removed
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System
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2020-06-03T15:54:14Z (over 4 years ago)
Source: https://outdoors.stackexchange.com/a/3359 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/