View Full Version : Bivy Sack
moparinoia
06-29-2007, 15:20
I was looking around for a bivy sac, but i didnt find anyhting i liked (because they seem very expensive). So i want to make one out of real thick plastic. 20mil or so. Has anyone ever been in a plastic bivy sack? Was it good bad? any special considerations? What do you all think of this idea?
Ventilation or you will drown. Usually at both ends.
Tom
I was looking around for a bivy sac, but i didnt find anyhting i liked (because they seem very expensive). So i want to make one out of real thick plastic. 20mil or so. Has anyone ever been in a plastic bivy sack? Was it good bad? any special considerations? What do you all think of this idea?
Check out Titanium Goat for inexpensive bivy's. Basic bivy is $40 and weighs 4.5oz.
Footslogger
06-29-2007, 15:35
I was looking around for a bivy sac, but i didnt find anyhting i liked (because they seem very expensive). So i want to make one out of real thick plastic. 20mil or so. Has anyone ever been in a plastic bivy sack? Was it good bad? any special considerations? What do you all think of this idea?
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Plastic isn't a very good material to use. It will trap any and all vapor trying to escape. You will end up wet.
Case in point ...I own a bivy "cover" made out of water repellant nylon and it has a waterproof silnylon lower panel. I pulled it over my bag late at night in the dark over my sleeping bag and accidentally got the silnylon side UP instead of down. During the night I pulled my arm out of my sleeping bag and went to lay it down on top of the bag ...COVERED WITH MOISTURE.
Go with a waterproof BREATHABLE fabric and you'll be a lot happier camper.
'Slogger