Let me add that in a survival situation you may wish to remain unobserved whether you are holed up or moving. Inherently quiet clothing and gear, as well as camoflague and good woodcraft, would seem to be a good idea.

I was watching a deer move along here and there from my tarp- wrapped sleeping bag, I was also wearing my jacket because I was cold. When the deer wandered out of my window of vision I tried to roll over to be able to follow - instant scrape and crinkle that sent the deer bounding away. I spent an eye- and ear-opening day noticing how loud my gear was as I hiked and did camp chores.