"Jury is Still Out" - Review of Mountain Hardwear Conduit SL Bivy

I've owned this product for over year and still can't make up my mind if it was a good purchase. I got it to use as an extra layer of protection from light snow and condensation during winter camping in tents and shelters. On several occasions in the Adirondacks on 15-20 degree nights have found it to actually cause my sleeping bag to get damper on the outer surfaces than when I used nothing. Recently I've used it to sleep out sans tent in 30 degree nights through light rain/snow and it performed well. My sleeping bag and I remained dry. My theory is that in a confined space such as a tent or shelter (in this case a 3 walled AT stye shelter with a tarp across the front to block wind) the air itself becomes moist from the people inhabiting that space. This prevents efficient moisture transfer through the Conduit SL material. However, when used outside in open air the Conduit SL material does not appear to have this issue. I haven't used it in warmer temperatures or in a true wet/rainy situation so I can't comment on that. I'd recommend it for tarp or open air campers only.
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