I am considering a synth bag for my BMT trip this spring. It may be awfully wet at that time of year.

I have been looking and might have made a decsion- (we will discuss this later)

My question is: What is the lightest 30 degree synthetic bag out there.
All I care about is 30 degree rating and weight.

I did search the boards some time ago and took what knowledge I gained to do my bag search - now all I want to do is be sure I have not overlooked something.