Mylar emergency blankets are great survival gear but sometimes you need more than that. The Coleman North Rim Extreme Weather Bag will keep you cozy warm when the air temperature is 0 degrees Fahrenheit. In temperatures like that you can lapse into hypothermia quickly especially if you’ve been slogging through the woods all day and are sweaty. Just crawl in the North Rim bag and pull the drawstring to lock in the warmth. The cover is durable rip-stop nylon so you can lay it on the ground if need be and there are snag free dual zippers so you can get in and out quickly and easily. Must have survival gear for winter adventurers.
For personnel who are flying over large bodies of water, in additional to wearing a survival suit over cold water, a survival kit may have additional items such as a small self inflating raft to get the aircrewman out of cold or predator infested waters, flotation vests, sea anchor, fishing nets, fishing equipment, fluorescent sea marking dye, pyrotechnical signals, a survival radio and/or radio-beacon, formerly a distress marker light replaced by a flashing strobe, formerly a seawater still or chemical desalinator kit now replaced by a hand pumped reverse osmosis desalinator (MROD) for desalinating seawater, a raft repair kit, a paddle, a bailer and sponge, sunscreen, medical equipment, a whistle, a compass, and a sun shade hat.
The Modern Lifestyle Prepper is another one to avoid. It’s not just a game of stock up enough to maintain creature comforts until normalcy is restored. A genuine situation will require the skills and abilities survive with what is available. Can you build a shelter, how long will it take, can you make fire, do you have basic medical knowledge, can you actually trap an animal, can you walk into the woods right now and get dinner?
It turns out that when you're down to your last moldy hunk of bread and giardia-laced mud puddle, letting it all melt away in a cloud of smoke for a few precious moments can mean the difference between giving up and giving the rat (eating) race another go. If history has anything to say, it's more common than you think for people to happily give up MREs and gunlord harems in return for hastening their ends with carcinogens wrapped up in tidy paper packages. In traumatic situations like war, cancer sticks are often valued more highly than food. Even in the current (more or less) pre-apocalyptic global economy, cigarettes are one of the stable forms of currency.
Interest in the movement picked up during the Clinton administration due in part to the debate surrounding the Federal Assault Weapons Ban and the ban's subsequent passage in 1994. The interest peaked again in 1999 triggered by fears of the Y2K computer bug. Before extensive efforts were made to rewrite computer programming code to mitigate the effects, some writers such as Gary North, Ed Yourdon, James Howard Kunstler, and investments' advisor Ed Yardeni anticipated widespread power outages, food and gasoline shortages, and other emergencies. North and others raised the alarm because they thought Y2K code fixes were not being made quickly enough. While a range of authors responded to this wave of concern, two of the most survival-focused texts to emerge were Boston on Y2K (1998) by Kenneth W. Royce, and Mike Oehler's The Hippy Survival Guide to Y2K. Oehler is an underground living advocate, who also authored The $50 and Up Underground House Book, which has long been popular in survivalist circles.
In the next decade Howard Ruff warned about socio-economic collapse in his 1974 book Famine and Survival in America. Ruff's book was published during a period of rampant inflation in the wake of the 1973 oil crisis. Most of the elements of survivalism can be found there, including advice on food storage. The book championed the claim that precious metals, such as gold and silver, have an intrinsic worth that makes them more usable in the event of a socioeconomic collapse than fiat currency. Ruff later published milder variations of the same themes, such as How to Prosper During the Coming Bad Years, a best-seller in 1979.
Mainstream economist and financial adviser Barton Biggs is a proponent of preparedness. In his 2008 book Wealth, War and Wisdom, Biggs has a gloomy outlook for the economic future, and suggests that investors take survivalist measures. In the book, Biggs recommends that his readers should "assume the possibility of a breakdown of the civilized infrastructure." He goes so far as to recommend setting up survival retreats: "Your safe haven must be self-sufficient and capable of growing some kind of food," Mr. Biggs writes. "It should be well-stocked with seed, fertilizer, canned food, medicine, clothes, etc. Think Swiss Family Robinson. Even in America and Europe, there could be moments of riot and rebellion when law and order temporarily completely breaks down."
This group consists of people who live in tornado, hurricane, flood, wildfire, earthquake or heavy snowfall-prone areas and want to be prepared for possible emergencies. They invest in material for fortifying structures and tools for rebuilding and constructing temporary shelters. While assuming the long-term continuity of society, some may have invested in a custom-built shelter, food, water, medicine, and enough supplies to get by until contact with the rest of the world resumes following a natural emergency.
Preparing for catastrophic or short range survival is extremely personal and most of us keep it tight to our chest. I think PowderKeg says it best – Invisible and then Nuttus who knows that not all of us are the same skill or wherewithal stage, yet as a TEAM we shore up each others weaknesses, learn off each others strengths and it is a continual building process going forward.
One newsletter deemed by some to be one of the most important on survivalism and survivalist retreats in the 1970s was the Personal Survival ("P.S.") Letter (circa 1977–1982). Published by Mel Tappan, who also authored the books Survival Guns and Tappan on Survival. The newsletter included columns from Tappan himself as well as notable survivalists such as Jeff Cooper, Al J Venter, Bruce D. Clayton, Nancy Mack Tappan, J.B. Wood (author of several gunsmithing books), Karl Hess, Janet Groene (travel author), Dean Ing, Reginald Bretnor, and C.G. Cobb (author of Bad Times Primer). The majority of the newsletter revolved around selecting, constructing, and logistically equipping survival retreats. Following Tappan's death in 1980, Karl Hess took over publishing the newsletter, eventually renaming it Survival Tomorrow.
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.
Anarcho-primitivists share many characteristics with survivalists, most notably predictions of a pending ecological disaster. Writers such as Derrick Jensen argue that industrial civilization is not sustainable, and will therefore inevitably bring about its own collapse. Non-anarchist writers such as Daniel Quinn, Joseph Tainter, and Richard Manning also hold this view. Some members of the Men Going Their Own Way subculture also promote off-grid living and believe that modern society is no longer liveable.
Paracord is one of the most versatile pieces of survival gear you can carry. It has applications as diverse as helping you set up a makeshift tent to creating a clothesline for drying wet clothes to establishing a perimeter around your campsite that will warn you of the approach of curious or hungry mammals. On top of that you can use it to transcend physical obstacles like small cliffs you might encounter as you attempt to reach civilization. It’s essential survival gear for the person that likes to be prepared for any eventuality.
This group stresses being able to stay alive for indefinite periods in life-threatening wilderness scenarios, including plane crashes, shipwrecks, and being lost in the woods. Concerns are: thirst, hunger, climate, terrain, health, stress, and fear. The rule of 3 is often emphasized as common practice for wilderness survival. The rule states that a human can survive: 3 minutes without air, 3 hours without shelter, 3 days without water, 3 weeks without food. 
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.