Darrenwrote a review of MSR E-Bivy on June 15, 2009
This bivy would get a 5 if the top material were something, anything that is breathable. The dimensions, quality, and overall design of this bivy are great. However, the entire bivy is made of sil-nylon, which is fine for the floor, but not the whole thing. Used it on a weekend and my bag was totally soaked inside the bivy each morning. I guess the same guy that designed the HyperFlow designed this? I thought I would give it a try anyway, but had to send it back. If they would change the top material it would be a winner.