I have seen the bags people build after a few months of prepper YouTube. They are enormous. Sixty-five, seventy, eighty pounds. Built by people who have never humped a loaded pack more than a quarter mile at a time. The guy who built that bag is not bugging out on foot. He is getting two miles down the road with blown knees and a ruined back. A bag you cannot carry for six hours is not a bug-out bag. It is wishful thinking with shoulder straps. What the Weight Math Says The general standard is t