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Tyvek bivy with Down Bag?? Bad Idea??
Is it a bad idea to use a down bag with a MYOG tyvek bivy? I would think the condensation would be bad for the bag. Should a synthetic fill only be used with a tyvek bivy? Help!
I expect you will need a vapor barrier with either insulation.Can anyone here comment on VBL use in above freezing and milder conditions?
Edited by tippymcstagger on 05/15/2008 13:31:00 MDT.
Vapor Barrier? Not exactly sure what that is.
It is an impermeable layer between your body (wet/vapor) and your insulation (dry). I think Western Mountaineering sells one, or you can go cheep and tape a couple trash bags together.I still haven't tried this but it by no means a new idea.
Would this be necessary in the spring summer months? Or more a winter thing?
BBL is a bad idea above freezing, and quite unnecessary as well. It becomes useful some distance below freezing.Search the Forum for it in other threads.
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