Basic Tools
Every first-aid kit should contain at least one pair of non-latex gloves, a quick reference first-aid manual, CPR microshield, scissors, emergency blanket, pocketknife/multi-tool, matches/lighter, tweezers and a thermometer. Depending on the climate in which you are traveling, you may also consider carrying hand warmers or cold compresses for environmental exposures and injuries.
Bandages
From the minor scrape to a laceration, bandages of all sizes are a fundamental need for any wilderness first-aid kit. In addition to having different sizes of Band-aids, your kit should have sterile gauze pads, gauze rolls, at least one elasticized bandage, butterfly bandages, 1-inch athletic tape, moleskin for blisters and 2nd skin burn pads.
Medications and Incidentals
Stock the kit with common necessities such as ibuprofen, antibiotic cream, hydro-cortisone cream, antihistamines, antacids, electrolytes, lip balm, sunscreen, cough drops, antiseptic wipes or soap, eye drops and a sealable bag for waste.
Additional Considerations
Inspect your first-aid kit frequently for familiarity and awareness of the contents. Many of the supplies contained in the kit have a shelf life, so remember to replace expired and used contents as needed. Never stock your first-aid kit with items you are uncomfortable with or do not know how to use. Once you have your kit stocked, take one extra step for added safety by leaving your itinerary with friends or family back home.