Aside from the normal pocket or key chain sized survival kits, a pre-packed backpack, or ?bug out bag?, is an intelligent precaution for the vehicle, home, or office. A backpack for normal hiking or backpacking is in reality simply a huge survival kit anyway, with a lot of luxury items. How much do you want to carry? It?s up to you. With these packs you can load up to a few days of material, or just the basics. The Camelbak products kill two birds with one stone, giving integral water carrying, and convenient hydration, while the more military styled packs give outstanding durability for hard use. Depending on where you are, and what your needs are, these packs represent a good choice of quality, durability, and time tested design. With careful thought, a few pre-positioned bags can alleviate the pain of unexpected dislocation or natural disaster.