OK … advancing an idea … : )
I have found some past attempts at this rain gear & bivy combo but nothing in the 5 to 7 ounce range that I am shooting for.
Rainjacket that is on the bottom of the bivy, and the top end cinches like a stuff sack.
When you go into jacket mode, you clip the cinch end up inside under your armpits.
so its folded in half inside itself.
Cinch off the arms and hood as a bivy
The bivy idea is using the Oware Hot Weather Bivy.
http://shop.bivysack.com/product.sc?productId=75&categoryId=2


Here is a silnylon version by Expedlife.
http://www.expedlife.com/2011/10/exped-bivy-poncho-ul.html




