Every year in the US about 150 people die while out and about in national parks, more than 1,000 die in hunting-related incidents and thousands of backcountry enthusiasts get in deep trouble and require a Search and Rescue team to save them; with dozens of those folks dying while awaiting rescue. Most fatalities are the result of poor preparation. Bad weather descends and people get lost. They wander without water or shelter, often injuring themselves in the process. If they survive they often suffer frostbite, hypothermia, dehydration, trench foot or some combination of them all.
Learn how to use it – What good is a compass if you don’t know how to use it? Not much. How about your Tenacious Tape? Or your GPS locator, or multitool? It’s great to head out into the wilderness with all the appropriate survival gear but if you don’t know how to use it when the time comes it will be as useless as the “g” in “lasagna”. Once you’ve decided what you need and have purchased everything take the time to familiarize yourself with what you have and how it works. Take the GPS locator out into your local state park and practice with it. Practice starting a fire with your emergency fire starter. Buy some extra Tenacious Tape and a cheap raincoat and practice cutting it up and making repairs. Take your survival knife out on a short hike and see what its practical limitations are when it comes to cutting wood etc. You might need a larger one or one with a longer serrated edge. The bottom line is this: make sure you know how to use the survival gear you have before you leave civilization behind and head into the woods.
Astronauts are provided with survival kits due to the difficulty of predicting where a spacecraft will land on its return to earth, especially in the case of an equipment failure. In early US space flights, the kit was optimised for survival at sea; the one provided for John Glenn on the first American space flight in Friendship 7 contained "a life raft, pocket knife, signaling mirror, shark repellent, seawater desalting tablets, sunscreen, soap, first aid kit, and other items". A survival kit was provided for the Apollo program which was "...designed to provide a 48-hour postlanding (water or land) survival capability for three crewmen between 40 degrees North and South latitudes". It contained "a survival radio, a survival light assembly, desalter kits, a machete, sunglasses, water cans, sun lotion, a blanket, a pocket knife, netting and foam pads".
For global catastrophic risks the costs of food storage become impractical for most of the population  and for some such catastrophes conventional agriculture would not function due to the loss of a large fraction of sunlight (e.g. during nuclear winter or a supervolcano). In such situations, alternative food is necessary, which is converting natural gas and wood fiber to human edible food.
A supply of nonperishable food and water are a core necessity for every survival kit. Amazon.com offers several varieties of survival kits with emergency food for different situations. For the boat, car, or RV, high caloric density food bars are a compact and affordable way to stay safe. You’ll also find dehydrated meals in large quantities prepackaged compact bins for convenient storage. Waterproof survival kits are perfect for the basement, and contain up to three months of food for four adults.
In this review guide we’re going to shine a light on 21 essential pieces of survival gear everyone should seriously consider having in their survival pack. We’re going to concentrate on survival gear aimed at aiding those engaged in outdoor activities and not those forced from their home by natural disaster, although some of these products will also be useful in those types of situations. We’ll start by highlighting 3 pieces of must-have survival gear; those things we would not venture into the wilderness without, and then move on to other valuable survival aids you’ll want to think about packing.