Often survival practitioners will carry with them a "survival kit". This consists of various items that seem necessary or useful for potential survival situations, depending on anticipated challenges and location. Supplies in a survival kit vary greatly by anticipated needs. For wilderness survival, they often contain items like a knife, water container, fire starting apparatus, first aid equipment, food obtaining devices (snare wire, fish hooks, firearms, or other,) a light, navigational aids, and signalling or communications devices. Often these items will have multiple possible uses as space and weight are often at a premium.
According to the Bug Out Bag Academy, the origins of bug out bags can be traced to the bags that many aviators in the military put together before missions. These were first referred to as ‘bail-out bags’ and they held items that would be critical for survival if a plane was shot down or experienced critical engine failure. Many WWII aviators actually carried gold or silver bullions in their bug out bags, as these were (and still largely are) considered the ‘universal currency’.
Some survival books promote the "Universal Edibility Test". Allegedly, it is possible to distinguish edible foods from toxic ones by a series of progressive exposures to skin and mouth prior to ingestion, with waiting periods and checks for symptoms. However, many experts including Ray Mears and John Kallas reject this method, stating that even a small amount of some "potential foods" can cause physical discomfort, illness, or death.
Another concern when you’re lost in the wild is where to procure potable water. Sometimes there will be bubbling streams of crystal clear water rolling down wooded hillsides to fill your water bottle and sometimes you’ll have little more than a stagnant pool standing between you and dehydration. The LifeStraw Personal Water Filter is survival gear that can turn that stagnant pool into a lifesaver.
The Stealth Tactical bug out bag assumes that you have not been able to make it to a shelter and will need to fend for yourself in the outdoors. As such there’s plenty of tactical gear to keep you moving, keep you dry, keep you hydrated and keep you safe. That includes a dozen packets of purified water, rain ponchos, emergency sleeping bags, a fire starting kit, survival knife, foldable saw, emergency whistle, first aid kit, paracord, multi tool, candles and even a stethoscope so you can monitor your health.