What should a good car first-aid kit actually contain?

At minimum, reviewers we read consistently recommend assorted adhesive bandages, gauze pads, roller gauze, medical tape, antiseptic wipes, antibiotic ointment, nitrile gloves, trauma shears, and an emergency blanket. For drivers who want bleeding-control capability, specialist subreddits like r/TacticalMedicine repeatedly emphasize that the tourniquet and hemostatic gauze should be name-brand (NAR CAT, QuikClot) rather than the no-name versions bundled into most Amazon kits.