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Posted by calamitybrook on May 7, 2007 at 10:20:31 pm EDT
In reply to Re: bivvy sack posted by Tom D on May 7, 2007 at 9:54:43 pm EDT

In the case of a sleeping bag, a trim fit results in signficantly more warmth and less weight. But trimmed dimensions for bivvy sack results in much less advantage, and is therefore perhaps needless, and may even result in some compression of winter insulation.

Slightly larger dimensions would also be produce a little storage space, and be more useful as a two-person emergency shelter.

When Thermarest is inside bivvy and I'm lying on my side, it's tough to bend knees and hips. My OR sack only has zipper at top, which is good design, but if it were slightly wider, slithering in would be slightly easier.

But bivvy bags all seem to be about the same size. I use mine as a sleeping bag cover, or by itself, mostly under a separate shelter. Highly recommend the practice with light bags or in snow.

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• Re: bivvy sack - stevet (Guest) 00:39:15 05/22/2007

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