User Review: REI Minimalist (Long)

Overall, I think REI makes some great affordable gear alternatives, but I can't recommend this bivy if you want a breathable waterproof bivy, particularly if you are going to be using it in warm(above 60 Deg)or humid conditions.

While backpacking Zion NP in 10-50 Deg temps on clear crisp nights with a 12" snow cover using a Tyvek ground cloth, Thermarest 3/4 Prolite 3, and Marmot Helium 15 Deg sleeping bag I experienced condensation, moisture, frost and lite ice on top of the bivy as well as between the inside of the bivy and outside of the sleeping bag.

I assume that water vapor from my breath overloaded the capacity for the bivy fabric(REI Elements laminate) to transport the vapor to the outside of the bivy or the vapor froze within/on the fabric resulting in freezing moisture/vapor inside the bivy. I suspect the moisture/condensation would only increase in humid conditions resulting in a sweat-fest if the bivy was zipped up all the way. Perhaps, usable in the right conditions???

Long and roomy enough for my 200 lb. 6'4" med. frame. 17 ozs long, 15 ozs reg.