This is what I carry via checked luggage when I fly or travel in CONUS:

Escape & Evasion Bag

2 bota bags,

messenger bag,

FAK (3"ace, 2"ace, nitrile gloves, 2 medium dressings, 6-3"x3" sponges, assorted bandaids, adhesive tape),

messkit (dryer lint, HoBo knife, p-38),

wet ones,

1ltr bottled water,

water purification tablets,

Roamer (Teddy bear),

medicine pouch,

zip ties,

5 trash bags,

2 bic lighters,

7 granola bars, 10 coffee bags, 6 Datrex rations, beef jerky

insect repellant,

metal enameled cup,

KaBar knife,

3 bandannas,

road maps,

toilet paper roll,

100ft of paracord,

cotton & leather work gloves,

Feador (penny whistle)