The Perfect Compromise
I just got back from using this at 10K feet on Mt. Rainier. It dipped below freezing with 50 mph wind guests and the bivy performed flawlessly. No condensation and very wind resistant. I was able to fit my boots, water, food, and extra clothing in with me. It provides just enough space to prevent claustrophobia and no more. My only complaint is that it could benefit from a little extra shoulder room (I'm only 5-8, 160lbs). Otherwise ideal for a foul weather bivy. I plan on bringing it often for climbs.