Always remember that there are no setup limits or exact specifications for any kind of evacuation kit. It is always a good idea to constantly upgrade your basics with more complex items depending on you concerns and expectations. For instance, additional items your kit can include:

CPR mouthpiece
safety vest
N95 particulate respirators
dust mask
vented chemical splash goggles
hard hat
safety goggles
burn jell
infrared thermometer
solar blanket

If you feel more comfortable with taking most of your important documents with you in case of emergency it won't be an unnecessary precaution to include some of the following paper work in your emergency kit preparation.

imagery of household items
bank statements
guarantees, sales receipts, bills of sale
computer backups
copyrights and other patters
jewelry record
family videos and photos
instructions in case of fatality