A million years ago I saw what I think was a very light weight (<1 lbs.) down (mummy)sleeping bag liner. I have always regretted not purchasing it. It would have been an excellent addition to my sleeping bag in winter, and a perfect emergency bag for a one day snow-shoe hike. I can not find much of anything like it on line.
The only thing close to it I see is what they call a "down camping blanket." But it is not a "mummy" style, so there would be some wasted weight in that.
Any ideas? Basically looking for a down mummy bag at one pound or less with a price tag that will not give me a heart attack.
Thanks for any suggestions.