Recommend me a new man bag.

In 1981 I went to an Army surplus goods store and bought a shoulder bag. iirc, it had been originally used by some army somewhere for carrying a gas mask. It was utter simplicity: a rectangular cotton canvas bag with a strap that resembled a heavy twill tape. You could make one in an hour if you are handy at sewing.

I hate the swing back to rucksacks - they make me look and feel like a schoolboy and they feel so much less secure because you can't see behind your own back.