I was interested to read the recent vapour barrier article. Personally, I don't expect to do any long distance winter traveling. However, I would be interested in knowing if using an occasional vapour barrier of existing clothing might help keep things lighter on a long distance walk where the occasional night goes to freezing point or lower.
Here's my thinking. I understand that the vapour barrier doesn't result in large amounts of sweating (unless it is badly used and insulation is not adjusted correctly) so would it be possible, for instance, to turn montane featherlite windtop and trousers (or equivalent) inside out. These can keep a short light shower at bay. If worn over my merino base layer wouldn't they act as a vapour barrier if they weren't over loaded? If so, what amount of warmth would be added to the insulation?
Any thoughts?
