Can anybody comment on using an eVent bivy in winter compared to using a lightweight double wall tent, such as the Montbell diamond monoframe shelter?
Firstly, I'm aware that a tent is a weight-inefficient way to add warmth to a sleeping set up. Personally, however, I really enjoy using a double wall tent in the winter time because of the small temperature buffer between the outside air. I can change clothes, get out of my sleeping bag, etc, without feeling the bite of the wind, and without being as cold as I'd be if under a tarp. A warm atmosphere around me makes winter camping more enjoyable for me, so I like double wall tents.
The only sub-4 pound double wall tent I own, however, is an MSR Hubba which has an all mesh inner tent that adds no warmth at all, so I need to buy, as it were, a new double wall tent which has an inner tent that's fairly windproof.
I was planning on buying an eVent bivy for this summer, but it occured to me that maybe it would also work well in winter.
I don't know about using a bivy in cold weather because the only bivy sack I own is a homemade momentum-topped DWR bivy that's unfortunately too small to allow a winter sleeping bag to fully loft so I can't test it out in cold weather to see for myself.
So anyway, I've only got enough money for either one or the other. I know that a double wall tent will work great for me, but I was planning on buying an eVent bivy for this summer anyway and if it would add some warmth in winter conditions, then I'd just as soon get that.
I should also say that "winter camping" for me is lows around 0*F-10*F. Snow loading on a shelter is a non issue for the places I go this time of year.
Sorry for the long winded post, and thanks for the feedback.
