After seeing your emotional outburst on the Bivy, I suggest that you try to educate yourself somewhat.

I suggest a book called "The Book of the Bivvy " . It is written from the British point of view for hiking in a rainy environment.

http://www.amazon.com/Book-Bivvy-Ciceron...3312&sr=8-1

This is for hikers who use JUST the bivvy for shelter.

After reading it, you may understand what some people here are trying to tell you.