Dry socks - probably 101 uses, but dry, warm, unsweaty feet are an example of civilisation

A pack of Marvel superhero playing cards - cards for me, superhero pictures for my boy, a genuine twofer

Bottle opener - not exactly survival, but being able to open a proper beer (like a good IPA or a bottle of dog) seems pretty close to a lifesaver at times

Remember - any idiot can be uncomfortable