If you're trying to build a Sophisticated bug out bag to survive the Apocalypse one of the best Force Multipliers is something called a Thermal imager this will allow you to See anything that throws off heat no Matter what the conditions are thermal Imaging is far superior to night vision Normal camouflage will conceal you from Night vision but won't be able to Conceal you from thermal imaging these Thermal imagers can be important for Security and hunting when you're driving Down the highway and look out onto a Field you might not think anything is Out there but I guarantee you if you Pull out your thermal imager and look at The tree line you're going to see all Kinds of wildlife while these devices Are extremely costly I would recommend It for a more advanced prepper who Already has all the bare necessities