inside condensation problem in humid weather

By jerboy2468794314 Ranked #1100 - Sleeping Bags September 7, 2009

I used the E-bivy last night under a large silnylon tarp and over a summerweight down sleeping bag. The weather was rain showers, very humid (90% humidity), breezy and 54 degrees F.

Although the top looks thin and very breathable, I awoke to a disturbing amount of insensible perspiration moisture on the inside of the E-bivy's top. I suppose the air was so humid, my body's moisture was condensing on the inside of the sack and could not pass out. The outside of the down bag was wet in large spots. But, I had this problem on and off with another bivy bag.

I'll use the E-bivy again. Hopefully, condensation will not be a problem in drier weather. I hope I don't have to return it. There's no point in owning a bivy sack that holds in your body's insensible perspiration. The tarp kept off all the rain so I didn't get to see how resistant the E-bivy is to rain or mist.

View Details: MSR E-Bivy

Helpful Votes: 0 Yes | 0 No