Originally Posted by
jawnn
I do start out with another jacket (because of the sleeves) over this one when it is below 32f, but often remove it once get warmed up. Vapor barriers work by holding in the steam, so it is important to have more vents.
I live near seattle, the weather is not too cold here most of the time.
doubt you'd need a vapor barrier layer in seattle.
just an FYI, a raincoat as an outer layer isn't a "vapor barrier" system.
a vapor barrier insulation system works by preventing moisture into the insulation layer, preventing loss of insulative power, AND limit the body's natural perspiration system by developing a super-saturated microclimate against the skin from which moisture does not escape. you only wear very thin layers under VBL clothes, and that's usually just to keep from feeling like you're wearing a rubber sweat suit, what a VBL essentially is.