Sierra Designs Zissou 15

“Though many may be skeptical of “waterproof” down, our testers found that it worked quite well, specifically for situation where prolonged exposure to minimal water is an issue.  (Think feet against a condensation-covered tent wall, not a continuous downpour.)  One tester in the U.K. found it performed great for 10 damp nights in almost 100 percent humidity:  “Humid.  Always.  Like 85 to 97 percent on a ‘dry’ day, and 100 percent and pouring the other days.”  Yet the DwrDown tester stayed toasty.  The bad didn’t lose loft or soak through at all compared to another down bag that was noticeably droopy by the third night.  “Finally, down that does well in humidity!”  This was also the only bag in the review that didn’t have any complaints about the zipper sticking.  Testers would have liked to see an 800-fill version, but otherwise this bag was a top scorer in all categories:  warmth, packability, and features.”

http://www.sierradesigns.com/p-519-zissou-15.aspx