I linked the Canex option. I also have older MEC bags that I like (from before their buyout).

The premise of a three day bag is to have something to grab and go in an emergency. Prepacked, near the door -- that sort of thing. Wait for the emergency to blow over, and have enough supplies to weather the period you need to make a decision.

What do you folks think should be in a three day bag? Does it vary if you're urban or rural? What about weather and time of year?