The more I think about it, perhaps I simply need a light bag that slips over my sleeping bag but will fit nicely inside of my bug bivy? I only need a little wind resistance that is all. I don't plan on any winter trips. My wife is good at sewing, and with a little sucking up she might make me something <img src="/forums/images/graemlins/smile.gif" alt="" /> Can someone suggest a good material? What is the lightest wind resistant material available? Does wind resistance necessarily consititute being non breathable? Thanks.

Howie