Our DISASTER SURVIVAL ITEMS (DSI) increase a person's ability to overcome or do something. A Fire Blanket gives you the ability to overcome or stop a fire. A few DSIs are already in packages, like the Zip Stitches in package 2. or the pepper spray in package 3. Others can be bought in this collection, like the 3LB carbon steel hammer, for busting up concrete after an earthquake just rearranged your world.