I took delivery of my first down bag Tuesday, and I was thinking of turning it into a flexible all weather system by adding a liner (for extreme cold) that could also be used by itself in warm weather. Something like this
would be ideal, but I was hoping I could save a little $$ if I made it myself.
The question is, what light warm fabric would you recommend for this? I know fleece is common for this, but I'd like to know if there's something warmer for the same weight or just as warm for less weight.