Iodine tablets for water purification. A vacuum-packed sleeping bag with snow boots. Snares to catch fish or small game. A life raft with repair plugs. The raft has its own survival kit.
Survival kits vary according to the aircraft.
Single-seater fighter craft get all the same equipment because they have similar ejector seats. And C-130 crewmembers get Kevlar personal armor to protect against ground fire, instead of fighter pilots' gravity suits.