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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...
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...