What is a bug out bag? 
A bug-out bag is a portable kit that normally contains the items one would require to survive for seventy-two hours when evacuating from a disaster. 

Why do I need a bug out bag?
The primary purpose of a bug-out bag is to allow one to evacuate quickly if a disaster should strike. It is therefore prudent to gather all of the materials and supplies that might be required to do this in an easily portable means such as a backpack.

A properly equipped bugout bag is a necessity for every single person. When disaster strikes and you are forced to flee the last thing you want to be doing is trying to pack. Having a dedicated bag with all the essentials in it will give you peace of mind knowing you can get up and go at a moments notice. Remember it's not a matter of if, but when. 
There may come a time that you might have to flee your home due to a disaster. Having things ready to go at a moments notice can be the difference between life and death.