No need for a bivy with Momentum quilt?

[Ryan Gardner]

Am I right in assuming that I don't need a bivy if I do the following…

1) Make my quilt out of Momentum.
2) Sew the insulation only to the inside layer of Momentum, keeping the outside fabric un-punctured.
3) Make it wide enough to tuck under me to reduce drafts.

I'd be sleeping under a spacious tarp, with a Polycro ground cloth.

Also, Momentum is highly wind resistant right?

[David Wills]

aside from bug protection, a bivy is unnecessary. if you have a spacious tarp (6×9 at least), you don't necessarily need to only sew to the liner, but it could help some. Having some permanent way to stop drafts like buckles or lines that tighten the quilt will help with drafts, but i haven't found a need for them yet. it would be best just to test out your preferences in inclimate weather because everyone is different, as are peoples' definitions of 'necessary'.

I still haven't figured out why people are so adamant about bivies with quilts and small tarps. I think if you are having draft problems, you should convert your quilt to a topbag (lighter, more breathable and just as protective if you use the aforementioned construction) and if you are worried about splash, you should bring adequate shelter in the first place.

[Ryan Gardner]

I won't be chilled by high winds in a Momentum bag like I would in a regular sleeping bag right? (I mean from wind coming through the fabric).

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