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Any amount of insulation helps. There are 3 main areas of heat loss. Head, sides of chest, and groin area. Any form of fabric will work. Yes, even cotton. (Cotton's problem is when it's in the...
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Any amount of insulation helps. There are 3 main areas of heat loss. Head, sides of chest, and groin area. Any form of fabric will work. Yes, even cotton. (Cotton's problem is when it's in the...