dust mask, goggles, work gloves, water, energy bars, bandages, water filtering straw, zip lock bags.
Or there’s the B-52 survival kit as leaked in the movie Dr. Strangelove:
“Survival kit contents check. In them you’ll find: one forty-five caliber automatic; two boxes of ammunition; four days’ concentrated emergency rations; one drug issue containing antibiotics, morphine, vitamin pills, pep pills, sleeping pills, tranquilizer pills; one miniature combination Russian phrase book and Bible; one hundred dollars in rubles; one hundred dollars in gold; nine packs of chewing gum; one issue of prophylactics; three lipsticks; three pair of nylon stockings.”
Nitrile gloves as well.
They are very light and compact.
IN colder climates, where getting stuck in snow might be an issue, I suppose hand and foot warmers. A warm hat.