Re: Hiking in Skirts

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Article #99

#99

From: MB
Date: Fri, 13 Aug 2004 13:07

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Chris Townsend >
> Unfortunately in my experience radiant barriers in sleeping bags and
> synthetic filled jackets aren't breathable enough. I've tried several
> examples of both and found them sweaty (and one of the sleeping bags
> was quite noisy too). There may be models that perform better of
> course.

Interesting. If it isn't practical to make radiant 
barriers breathable enough, it seems that they wouldn't 
be a good idea within loft insulation, after all. 
Especially multiple barriers with insufficient 
breathability might act as nasty moisture traps.

Otoh, the VBL, which of course mustn't breath at all, 
can well double as a radiant barrier. Incidentally, I 
find that mylar "emergency" bags, especially if bothering 
to modifying the neck area, make good lightweight VBL's. 
Being nominally single-use items, the ones I've used aren't 
very durable though, lasting perhaps a couple of weeks 
of usage. They're noisy too.

Otoh, with hermetically sealed loft insulation, 
such as down-air-mats (like Stephenson's), or DAM 
type bag/shelters (Cocoon), lack of breathability is
of course irrelevant, and multiple radiant barriers 
would seem like a good idea especially for the upper 
parts of the latter.

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From: MB <*@*.*>
Subject: Re: Hiking in Skirts
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