[at-l] tyvek sleeping - a tale of 4 nights

[thornel@attglobal.net (W F Thorneloe)]

A few years ago, there were many threads regarding the use of Tyvek for 
just about everything. The prototypes of the Nomad tents were Tyvek, which 
I enjoyed borrowing once. I believe the reason Tyvek is not used is greater 
weight than silnylon, as Tyvek would allow water thru if you set it on a 
puddle (yep, I did that - once) even though the Tyvek had less condensation 
problems. I think Tyvek actually does a pretty good job with breathing, but 
I'd suspect that a Tyvek envelope would still have some risk of 
condensation and wetting a sleeping bag. You could probably make a Tyvek 
bivy with hoops to keep the "envelope" away from the bag. But I'd suspect 
it would be heavier than other bivys.

OrangeBug

At 03:13 PM 1/2/2002 -0500, Jonathan Hartford wrote:
>On Tue, Jan 01, 2002 at 02:32:41AM -0500, Delita Wright wrote:
>[snip]
> >
> > Has anyone thought of making a kinda tyvek envelope in the shape of a 
> ground
> > cloth?  Then you could sleep *on* it on warmer nights and *in* it for 
> colder
> > nights?  Maybe just the fold on one side, seal the bottom and leave the 
> other
> > side open?  Would tape work for the bottom?
>
>IMHO, The problem with this would be that tyvek doesn't breathe, and wouldn't
>let the vapor out, and you'd end up with a soggy bag.