In colorado springs there is a meetup group for prepping. Their bug out bag basics:

BOB is a last resort option - evacuate home scenario (packed and ready to go)
Enough food & supplies to last you 3 days minimum but preferably a week. Should include tools to survive longer if need be.
It is going to be heavier than a standard backpacking rig. Should carry 25% of your body weight.

Clothing - not entirely made of cotton. Layers off different farbic is key. Wool socks and bandanas.
Have blades/ knives, fire making tools, water filtration, mres / energy foods, cooking pot and navigation.