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Re: [at-l] down v fake fluff?

> What is a VBL?

Vapor Barrier Layer.  It's a liner you put in your sleeping bag that doesn't
allow water vapor to pass through.  When you crawl inside, the humidty level
rises to 100% inside of the VBL, but since it doesn't let any water vapor thru,
you don't have any water vapor in your loft of your bag.

S. Schuyler Stultz              Recognition Research Inc.
schuyler@rrinc.com              1872 Pratt Drive Suite 1200
(540) 231-6500                  Blacksburg, VA 24060
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