Hi Amy, thank you for your detailed answer! :D
So for sock wool, I am to look for wool/nylon blends, OR use wool and blend in my nylon as I knit. Thanks so much for the tip about the wooly nylon and using it in the parts of the sock that wear out quickest!!! Brilliant!!!
Would the same apply for cotton socks??? What about knitting with a 100% cotton yarn? What problems would I encounter with cotton? Would elasticity be a problem? (Sorry about all the questions!!!)