The Ten Essentials
Combustion (carry at least two: lighters, waterproof matches, flint-and-steel; also: tinder—twine or dryer lint)
Hydration (1–2 quart/liter-sized water bottles or Camelbak-style reservoir)
Nutrition (2–3 granola bars, energy bars, candy bars, GORP, whatever)
Navigation (compass, copy of map)
Illumination (headlamp or flashlight)
Insulation (extra clothing, fleece, warm hat, and rain jacket under “clothing” all count)
First-aid kit (the crew brings a kit, but carry a small one of your own, including personal medications—and you must advise adult leaders about any meds)
Tool and repair kit (pocket knife or Leatherman multitool; needle and thread; dental floss; duct tape wrapped around hiking pole or pencil)
Emergency shelter (space blanket/poncho)
Sun protection (sunscreen, sunglasses, UPF lip balm, hat with an all-around brim, long pants and long sleeves)