I carry a North First Aid Kit actually two of them. They have just about everything needed in an emergency situation. tourniquet, burn ointment, rescue breather, bandages of all sizes, emergency blanket, flashlight, matches, flint, stitch kit,snake bite kit, bee sting kit etc, etc, etc.
My father was the president of North safety products for 28 years. It helped me learn what I need in the field.
I keep an emergency beeper on me now that is controlled by satellite. Especially since my treestand accident.