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Tyvek bivy with Down Bag?? Bad Idea??
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Home › Forums › Gear Forums › Make Your Own Gear › Tyvek bivy with Down Bag?? Bad Idea??
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May 15, 2008 at 12:24 pm #1228977
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!
May 15, 2008 at 12:28 pm #1433431I expect you will need a vapor barrier with either insulation.
Can anyone here comment on VBL use in above freezing and milder conditions?
May 15, 2008 at 12:30 pm #1433433Vapor Barrier? Not exactly sure what that is.
May 15, 2008 at 12:37 pm #1433435It 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.
May 15, 2008 at 12:40 pm #1433437Would this be necessary in the spring summer months? Or more a winter thing?
May 15, 2008 at 2:49 pm #1433450BBL is a bad idea above freezing, and quite unnecessary as well. It becomes useful some distance below freezing.
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