I must say that I am not into women's clothing, but I venture that if you peruse any good outdoor catalog (REI, Patagonia, Duluth Trading) you will see a good many extremely practical garments that would likely serve as the beginning point for your post apocalyptic world. The mind reels at the thought of women reverting to Mother Hubbards and sun bonnets. Will we be driving Conestoga wagons and firing flintlocks? Or should we just regress all the way back to atlatls?

I know of a couple of places where we could do cave paintings....
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Geezer in Chief