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For me, it's landjaeger: Literally gets better with age. I'll take them out of the vaccuum-sealed packs and hang them to dry out. Stick them in my packs for hiking almost 100% of the time.
These snacks have their origins in german outdoorsmen and as a wartime ration. No need to refrigerate. You can get 'em most places in the Northern US. I get mine from a mennonite store. Jaeger literally means "hunter"