Packing the “Ten Essentials” whenever you step into the backcountry, even on day hikes, is a good habit. True, on a routine trip you may use only a few of them or none at all. It’s when something goes awry that you’ll truly appreciate the value of carrying these items that could be essential to your survival.

The original Ten Essentials list was assembled in the 1930s by The Mountaineers, a Seattle-based organization for climbers and outdoor adventurers, to help people be prepared for emergency situations in the outdoors. Back then, the list included a map, compass, sunglasses and sunscreen, extra clothing, headlamp/flashlight, first-aid supplies, fire starter, matches, knife and extra food.

Over the years, the list has evolved to a “systems” approach rather than including individual items. Here’s what it looks like today:

Updated Ten Essential Systems

  1. Navigation: map, compass, altimeter, GPS device, personal locator beacon (PLB) or satellite messenger
  2. Headlamp: plus extra batteries
  3. Sun protection: sunglasses, sun-protective clothes and sunscreen
  4. First aid: including foot care and insect repellent (as needed)
  5. Knife: plus a gear repair kit
  6. Fire: matches, lighter, tinder and/or stove
  7. Shelter: carried at all times (can be a light emergency bivy)
  8. Extra food: Beyond the minimum expectation
  9. Extra water: Beyond the minimum expectation
  10. Extra clothes: Beyond the minimum expectation

The exact items from each system that you take can be tailored to the trip you’re taking. For example, on a short day hike that’s easy to navigate you might choose to take a map, compass and PLB, but leave your GPS and altimeter behind. On a longer, more complex outing, you might decide you want all those tools to help you find your way. When deciding what to bring, consider factors like weather, difficulty, duration, and distance from help.

Continue reading on REI’s website or join REI for a class for more information about each of the Ten Essential systems.

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